diff --git a/src/Models/ExternalMerger.cs b/src/Models/ExternalMerger.cs
index 3130408e..9a27db0b 100644
--- a/src/Models/ExternalMerger.cs
+++ b/src/Models/ExternalMerger.cs
@@ -41,6 +41,7 @@ namespace SourceGit.Models
                     new ExternalMerger(6, "beyond_compare", "Beyond Compare", "BComp.exe", "\"$REMOTE\" \"$LOCAL\" \"$BASE\" \"$MERGED\"", "\"$LOCAL\" \"$REMOTE\""),
                     new ExternalMerger(7, "win_merge", "WinMerge", "WinMergeU.exe", "-u -e \"$REMOTE\" \"$LOCAL\" \"$MERGED\"", "-u -e \"$LOCAL\" \"$REMOTE\""),
                     new ExternalMerger(8, "codium", "VSCodium", "VSCodium.exe", "-n --wait \"$MERGED\"", "-n --wait --diff \"$LOCAL\" \"$REMOTE\""),
+                    new ExternalMerger(9, "p4merge", "P4Merge", "p4merge.exe", "-tw 4 \"$BASE\" \"$LOCAL\" \"$REMOTE\" \"$MERGED\"", "-tw 4 \"$LOCAL\" \"$REMOTE\""),
                 };
             }
             else if (OperatingSystem.IsMacOS())
@@ -53,6 +54,7 @@ namespace SourceGit.Models
                     new ExternalMerger(4, "kdiff3", "KDiff3", "/Applications/kdiff3.app/Contents/MacOS/kdiff3", "\"$REMOTE\" -b \"$BASE\" \"$LOCAL\" -o \"$MERGED\"", "\"$LOCAL\" \"$REMOTE\""),
                     new ExternalMerger(5, "beyond_compare", "Beyond Compare", "/Applications/Beyond Compare.app/Contents/MacOS/bcomp", "\"$REMOTE\" \"$LOCAL\" \"$BASE\" \"$MERGED\"", "\"$LOCAL\" \"$REMOTE\""),
                     new ExternalMerger(6, "codium", "VSCodium", "/Applications/VSCodium.app/Contents/Resources/app/bin/codium", "-n --wait \"$MERGED\"", "-n --wait --diff \"$LOCAL\" \"$REMOTE\""),
+                    new ExternalMerger(7, "p4merge", "P4Merge", "/Applications/p4merge.app/Contents/Resources/launchp4merge", "-tw 4 \"$BASE\" \"$LOCAL\" \"$REMOTE\" \"$MERGED\"", "-tw 4 \"$LOCAL\" \"$REMOTE\""),
                 };
             }
             else if (OperatingSystem.IsLinux())
@@ -65,6 +67,7 @@ namespace SourceGit.Models
                     new ExternalMerger(4, "beyond_compare", "Beyond Compare", "/usr/bin/bcomp", "\"$REMOTE\" \"$LOCAL\" \"$BASE\" \"$MERGED\"", "\"$LOCAL\" \"$REMOTE\""),
                     new ExternalMerger(5, "meld", "Meld", "/usr/bin/meld", "\"$LOCAL\" \"$BASE\" \"$REMOTE\" -output \"$MERGED\"", "\"$LOCAL\" \"$REMOTE\""),
                     new ExternalMerger(6, "codium", "VSCodium", "/usr/share/codium/bin/codium", "-n --wait \"$MERGED\"", "-n --wait --diff \"$LOCAL\" \"$REMOTE\""),
+                    new ExternalMerger(7, "p4merge", "P4Merge", "/usr/local/bin/p4merge", "-tw 4 \"$BASE\" \"$LOCAL\" \"$REMOTE\" \"$MERGED\"", "-tw 4 \"$LOCAL\" \"$REMOTE\""),
                 };
             }
             else
diff --git a/src/Resources/ExternalToolIcons/p4merge.png b/src/Resources/ExternalToolIcons/p4merge.png
new file mode 100644
index 00000000..010d8f6f
Binary files /dev/null and b/src/Resources/ExternalToolIcons/p4merge.png differ