diff --git a/include/MedtechSteppingAction.hh b/include/MedtechSteppingAction.hh
new file mode 100644
index 0000000..5450ed3
--- /dev/null
+++ b/include/MedtechSteppingAction.hh
@@ -0,0 +1,28 @@
+//
+//  MedtechSteppingAction.hh
+//  medtech
+//
+//  Created by Baranyai David on 2018. 04. 01..
+//
+
+#ifndef MedtechSteppingAction_hh
+#define MedtechSteppingAction_hh
+
+#include <stdio.h>
+#include "G4UserSteppingAction.hh"
+#include "MedtechEventAction.hh"
+
+class MedtechSteppingAction : public G4UserSteppingAction
+{
+public:
+    MedtechSteppingAction(MedtechEventAction *eventAction);
+    virtual ~MedtechSteppingAction();
+    
+    virtual void UserSteppingAction(const G4Step*);
+    
+private:
+    MedtechEventAction*  fEventAction;
+    G4LogicalVolume* fScoringVolume;
+};
+
+#endif /* MedtechSteppingAction_hh */
diff --git a/src/MedtechSteppingAction.cc b/src/MedtechSteppingAction.cc
new file mode 100644
index 0000000..675ea4b
--- /dev/null
+++ b/src/MedtechSteppingAction.cc
@@ -0,0 +1,40 @@
+//
+//  MedtechSteppingAction.cc
+//  medtech
+//
+//  Created by Baranyai David on 2018. 04. 01..
+//
+
+#include "MedtechSteppingAction.hh"
+
+MedtechSteppingAction::MedtechSteppingAction(MedtechEventAction* eventAction) : G4UserSteppingAction(), fEventAction(eventAction), fScoringVolume(0)
+{
+    
+}
+
+MedtechSteppingAction::~MedtechSteppingAction()
+{
+    
+}
+
+void MedtechSteppingAction::UserSteppingAction(const G4Step* step)
+{
+    if (!fScoringVolume) {
+        const MedtechDetectorConstruction* detectorConstruction
+        = static_cast<const MedtechDetectorConstruction*>
+        (G4RunManager::GetRunManager()->GetUserDetectorConstruction());
+        fScoringVolume = detectorConstruction->GetScoringVolume();
+    }
+    
+    // get volume of the current step
+    G4LogicalVolume* volume
+    = step->GetPreStepPoint()->GetTouchableHandle()
+    ->GetVolume()->GetLogicalVolume();
+    
+    // check if we are in scoring volume
+    if (volume != fScoringVolume) return;
+    
+    // collect energy deposited in this step
+    G4double edepStep = step->GetTotalEnergyDeposit();
+    fEventAction->AddEdep(edepStep);
+}