diff --git a/src/core/copyjob.h b/src/core/copyjob.h
--- a/src/core/copyjob.h
+++ b/src/core/copyjob.h
@@ -130,6 +130,11 @@
     void setWriteIntoExistingDirectories(bool overwriteAllDirs);
 
     /**
+     * Reimplemented to do a proper cleanup of partially copied files.
+     */
+    bool doKill() Q_DECL_OVERRIDE;
+
+    /**
      * Reimplemented for internal reasons
      */
     bool doSuspend() Q_DECL_OVERRIDE;
@@ -286,7 +291,7 @@
  *
  * @param src the file or directory to copy
  * @param dest the destination
- * @param flags copy() supports HideProgressInfo and Overwrite.
+ * @param flags copy() supports HideProgressInfo, Overwrite and NoCancelCleanup.
  * Note: Overwrite has the meaning of both "write into existing directories" and
  * "overwrite existing files". However if "dest" exists, then src is copied
  * into a subdir of dest, just like "cp" does. Use copyAs if you don't want that.
@@ -307,7 +312,7 @@
  *
  * @param src the file or directory to copy
  * @param dest the destination
- * @param flags copyAs() supports HideProgressInfo and Overwrite.
+ * @param flags copyAs() supports HideProgressInfo, Overwrite and NoCancelCleanup.
  * Note: Overwrite has the meaning of both "write into existing directories" and
  * "overwrite existing files".
  *
@@ -320,7 +325,7 @@
  *
  * @param src the list of files and/or directories
  * @param dest the destination
- * @param flags copy() supports HideProgressInfo and Overwrite.
+ * @param flags copy() supports HideProgressInfo, Overwrite and NoCancelCleanup.
  * Note: Overwrite has the meaning of both "write into existing directories" and
  * "overwrite existing files". However if "dest" exists, then src is copied
  * into a subdir of dest, just like "cp" does.
@@ -333,7 +338,7 @@
  *
  * @param src the file or directory to copy
  * @param dest the destination
- * @param flags move() supports HideProgressInfo and Overwrite.
+ * @param flags move() supports HideProgressInfo, Overwrite and NoCancelCleanup.
  * Note: Overwrite has the meaning of both "write into existing directories" and
  * "overwrite existing files". However if "dest" exists, then src is copied
  * into a subdir of dest, just like "cp" does.
@@ -349,7 +354,7 @@
  *
  * @param src the file or directory to copy
  * @param dest the destination
- * @param flags moveAs() supports HideProgressInfo and Overwrite.
+ * @param flags moveAs() supports HideProgressInfo, Overwrite and NoCancelCleanup.
  * Note: Overwrite has the meaning of both "write into existing directories" and
  * "overwrite existing files".
  * @return the job handling the operation
@@ -361,7 +366,7 @@
  *
  * @param src the list of files or directories to copy
  * @param dest the destination
- * @param flags move() supports HideProgressInfo and Overwrite.
+ * @param flags move() supports HideProgressInfo, Overwrite and NoCancelCleanup.
  * Note: Overwrite has the meaning of both "write into existing directories" and
  * "overwrite existing files". However if "dest" exists, then src is copied
  * into a subdir of dest, just like "cp" does.
diff --git a/src/core/copyjob.cpp b/src/core/copyjob.cpp
--- a/src/core/copyjob.cpp
+++ b/src/core/copyjob.cpp
@@ -135,6 +135,7 @@
         , m_totalSize(0)
         , m_processedSize(0)
         , m_fileProcessedSize(0)
+        , m_bFileCopyingIsInProcess(false)
         , m_processedFiles(0)
         , m_processedDirs(0)
         , m_srcList(src)
@@ -149,6 +150,7 @@
         , m_bAutoSkipDirs(false)
         , m_bOverwriteAllFiles(false)
         , m_bOverwriteAllDirs(false)
+        , m_bDoCancelCleanup(false)
         , m_conflictError(0)
         , m_reportTimer(nullptr)
     {
@@ -180,6 +182,7 @@
     KIO::filesize_t m_totalSize;
     KIO::filesize_t m_processedSize;
     KIO::filesize_t m_fileProcessedSize;
+    bool m_bFileCopyingIsInProcess;
     int m_processedFiles;
     int m_processedDirs;
     QList<CopyInfo> files;
@@ -203,6 +206,7 @@
     bool m_bAutoSkipDirs;
     bool m_bOverwriteAllFiles;
     bool m_bOverwriteAllDirs;
+    bool m_bDoCancelCleanup;
     int m_conflictError;
 
     QTimer *m_reportTimer;
@@ -290,6 +294,9 @@
             }
             job->d_func()->m_operationType = copyType;
         }
+        if (!(flags & KIO::NoCancelCleanup)) {
+            job->d_func()->m_bDoCancelCleanup = true;
+        }
         return job;
     }
 };
@@ -544,6 +551,24 @@
     }
 }
 
+bool CopyJob::doKill()
+{
+    const bool res = Job::doKill();
+
+    Q_D(CopyJob);
+
+    // If we are interrupted in the middle of file copying,
+    // we may end up with corrupted file at the destination.
+    // It is better to clean up this file.
+    if (d->m_bDoCancelCleanup &&
+            d->state == STATE_COPYING_FILES &&
+            d->m_bFileCopyingIsInProcess) {
+        KIO::del(d->m_currentDestURL);
+    }
+
+    return res;
+}
+
 bool CopyJob::doSuspend()
 {
     Q_D(CopyJob);
@@ -1272,6 +1297,9 @@
 void CopyJobPrivate::slotResultCopyingFiles(KJob *job)
 {
     Q_Q(CopyJob);
+
+    m_bFileCopyingIsInProcess = false;
+
     // The file we were trying to copy:
     QList<CopyInfo>::Iterator it = files.begin();
     if (job->error()) {
@@ -1797,6 +1825,7 @@
 {
     Q_Q(CopyJob);
     qCDebug(KIO_COPYJOB_DEBUG) << data_size;
+    m_bFileCopyingIsInProcess = true;
     m_fileProcessedSize = data_size;
     q->setProcessedAmount(KJob::Bytes, m_processedSize + m_fileProcessedSize);
 
diff --git a/src/core/job_base.h b/src/core/job_base.h
--- a/src/core/job_base.h
+++ b/src/core/job_base.h
@@ -278,7 +278,8 @@
  */
 enum JobFlag {
     /**
-     * Show the progress info GUI, no Resume and no Overwrite
+     * Show the progress info GUI, no Resume, no Overwrite, and do incomplete
+     * files cleanup if canceled.
      */
     DefaultFlags = 0,
 
@@ -311,6 +312,15 @@
      * @since 5.43
      */
     NoPrivilegeExecution = 8,
+
+    /**
+     * By default (since 5.44), if the job is canceled, it will clean up incompletely copied
+     * files, if they exist. This flag turns off such a behavior.
+     * Used by KIO::copy(), KIO::copyAs(), KIO::move(), KIO::moveAs()
+     *
+     * @since 5.44
+     */
+    NoCancelCleanup = 16,
 };
 Q_DECLARE_FLAGS(JobFlags, JobFlag)
 Q_DECLARE_OPERATORS_FOR_FLAGS(JobFlags)