An output device for a robotic hand changer comprising: an operating rod inserted into a housing so as to be movable in an axial direction of the operating rod, the operating rod being configured to be moved in the axial direction by an external force in the axial direction applied to an end portion of the operating rod; a force multiplier provided between the housing and the operating rod, the force multiplier being configured to assist movement of the operating rod in the axial direction; and an output rod configured to be moved by the operating rod in a direction crossing the axial direction of the operating rod, characterised in that the force multiplier includes: an engagement member; an engagement recess provided on an outer periphery of the operating rod and configured to receive the engagement member in a fitted manner, the engagement recess having a cam surface configured to make engagement with the engagement member; an engagement member supporter configured to allow movement of the engagement member in a radial direction of the operating rod and to restrict movement of the engagement member in the axial direction of the operating rod; and a pressing member configured to be biased by a spring thereby to press the engagement member, the pressing member having a force-multiplying surface configured to make engagement with the engagement member. an operating rod inserted into a housing so as to be movable in an axial direction of the operating rod, the operating rod being configured to be moved in the axial direction by an external force in the axial direction applied to an end portion of the operating rod; a force multiplier provided between the housing and the operating rod, the force multiplier being configured to assist movement of the operating rod in the axial direction; and an output rod configured to be moved by the operating rod in a direction crossing the axial direction of the operating rod, characterised in that the force multiplier includes: an engagement member; an engagement recess provided on an outer periphery of the operating rod and configured to receive the engagement member in a fitted manner, the engagement recess having a cam surface configured to make engagement with the engagement member; an engagement member supporter configured to allow movement of the engagement member in a radial direction of the operating rod and to restrict movement of the engagement member in the axial direction of the operating rod; and a pressing member configured to be biased by a spring thereby to press the engagement member, the pressing member having a force-multiplying surface configured to make engagement with the engagement member. an engagement member; an engagement recess provided on an outer periphery of the operating rod and configured to receive the engagement member in a fitted manner, the engagement recess having a cam surface configured to make engagement with the engagement member; an engagement member supporter configured to allow movement of the engagement member in a radial direction of the operating rod and to restrict movement of the engagement member in the axial direction of the operating rod; and a pressing member configured to be biased by a spring thereby to press the engagement member, the pressing member having a force-multiplying surface configured to make engagement with the engagement member.