diff --git a/src/presentation/artifacteditormodel.h b/src/presentation/artifacteditormodel.h
--- a/src/presentation/artifacteditormodel.h
+++ b/src/presentation/artifacteditormodel.h
@@ -92,6 +92,7 @@
     void setStartDate(const QDateTime &start);
     void setDueDate(const QDateTime &due);
     void delegate(const QString &name, const QString &email);
+    void openAttachment(const QModelIndex &index);
 
     void setEditingInProgress(bool editingInProgress);
 
diff --git a/src/presentation/artifacteditormodel.cpp b/src/presentation/artifacteditormodel.cpp
--- a/src/presentation/artifacteditormodel.cpp
+++ b/src/presentation/artifacteditormodel.cpp
@@ -25,7 +25,10 @@
 #include "artifacteditormodel.h"
 
 #include <QAbstractListModel>
+#include <QDesktopServices>
+#include <QDir>
 #include <QIcon>
+#include <QTemporaryFile>
 #include <QTimer>
 
 #include <KLocalizedString>
@@ -291,6 +294,25 @@
     m_delegateFunction(task, delegate);
 }
 
+void ArtifactEditorModel::openAttachment(const QModelIndex &index)
+{
+    auto task = m_artifact.objectCast<Domain::Task>();
+    Q_ASSERT(task);
+    auto attachment = task->attachments().at(index.row());
+
+    auto uri = attachment.uri();
+    if (!attachment.isUri()) {
+        auto tempFile = new QTemporaryFile(QDir::tempPath() + QStringLiteral("/zanshin_attachment_XXXXXX"), this);
+        tempFile->open();
+        tempFile->setPermissions(QFile::ReadUser);
+        tempFile->write(attachment.data());
+        tempFile->close();
+        uri = QUrl::fromLocalFile(tempFile->fileName());
+    }
+
+    QDesktopServices::openUrl(uri);
+}
+
 void ArtifactEditorModel::setEditingInProgress(bool editing)
 {
     m_editingInProgress = editing;
diff --git a/src/widgets/editorview.h b/src/widgets/editorview.h
--- a/src/widgets/editorview.h
+++ b/src/widgets/editorview.h
@@ -83,6 +83,8 @@
     void onStartTodayClicked();
     void onDelegateEntered();
 
+    void onAttachmentDoubleClicked(const QModelIndex &index);
+
 private:
     QObject *m_model;
 
diff --git a/src/widgets/editorview.cpp b/src/widgets/editorview.cpp
--- a/src/widgets/editorview.cpp
+++ b/src/widgets/editorview.cpp
@@ -83,6 +83,7 @@
     connect(ui->dueDateEdit, &KPIM::KDateEdit::dateEntered, this, &EditorView::onDueEditEntered);
     connect(ui->doneButton, &QAbstractButton::toggled, this, &EditorView::onDoneButtonChanged);
     connect(ui->startTodayButton, &QAbstractButton::clicked, this, &EditorView::onStartTodayClicked);
+    connect(ui->attachmentList, &QAbstractItemView::doubleClicked, this, &EditorView::onAttachmentDoubleClicked);
     connect(m_delegateEdit, &KLineEdit::returnPressed, this, &EditorView::onDelegateEntered);
 
     setEnabled(false);
@@ -278,3 +279,11 @@
         m_delegateEdit->clear();
     }
 }
+
+void EditorView::onAttachmentDoubleClicked(const QModelIndex &index)
+{
+    if (!m_model)
+        return;
+
+    QMetaObject::invokeMethod(m_model, "openAttachment", Q_ARG(QModelIndex, index));
+}