To provide an installing tool for an elevator equipped with an enhanced working easiness capable of lifting a balance weight continuously while an obstacle eventually existing near a weight rail, for example a bracket, is avoided.

The installing tool of the elevator is equipped with a base fixed to the balance weight 2, a rail guide member installed on the base rotatably through a shaft and with one end protruded from the shaft in the direction of the weight rail so as to engage with the rail, and a rail guide balance member which rotates the rail guide member round the shaft complying with the obstacle existing when the rail guide member abuts to the obstacle at the time of lifting the balance weight, and when the rail guide member avoids the obstacle, restores it to the original condition.