To provide a device for fixing a switch or the like, which stably fixes the switch or the like to a moving object in a complicated shape such as the finger of a person without hurting the finger or the like.

A device for fixing a switch or the like includes: a housing part for housing the switch or the like; a movable connection part for connecting the housing part and a body; a shape variable core for determining a body shape; a flexible body that follows the core; two movable belts for fixing the body and a finger or the like; a device for moving and fixing the belts; a first position adjusting and fixing means by the movable connection part between the housing part of the switch or the like and the body; a second position adjusting and fixing means between the switch or the like and the finger or the like by the body; a third position adjusting and fixing means between the belt and the body by the movable belt to be wound around the finger or the like; and a fourth position adjusting and fixing means between the body and the finger or the like by the movable belt. The first to fourth position adjusting and fixing means function independently respectively to perform relative position adjustment and fixation of the switch or the like and the finger or the like.