A lever 1 pivots within a certain stroke range by a player's depression of the lever 1. A coil spring 4 is displaceable within the entire stroke range of the lever 1 to produce a reaction force having a characteristic that the reaction force increases with an increase in the displacement. A dome-shaped rubber member 5 starts being displaced at some point in the stroke of the lever 1 to produce a reaction force having a characteristic that the rate of change in reaction force with respect to the displacement decreases in an area placed in the displacement. The characteristic is obtained by the dome-shaped rubber member 5 coming into contact with the lever 1 at some point in the stroke of the lever 1 to start being displaced by further depression of the lever 1 to buckle at some point in the displacement of the dome-shaped rubber member 5.