To provide a safety device for an elevator doorway preventing users from being drawn into gaps between doors and doorway pillars or landing jambs or being sandwiched between the doors.

This safetly device is provided with landing doors for opening/closing a landing doorway, car doors for opening/closing a cage doorway, sensors for a car side provided for the car doors, sensors for a landing side provided for the each car door and optical systems provided for the each landing door opposing to the each sensor for the landing side. The sensors for the car side pass an optical axis along a face in the cage side of the car doors, and detect interception of the optical axis. The sensors for the landing side emit light toward the landing side, and introduce light returned from the landing side to the car side. The optical systems pass light from the landing side through the optical axis along a face in the landing side of the landing doors, and return the light to the car side.