PURPOSE: To provide a key touch detector capable of easily adjusting the operation timing of a shutter after the shutter is mounted.
CONSTITUTION: This key touch detector has a switching element 5, a detector 4 which is mounted on one side face of a key member 1 attaching and detaching to and from the switching element 5 according to a key touch and actuates the switching element 5 and an adjusting mechanism which changes the relative position of the detector 4 and the key member 1. The detector 4 is mounted at one end on one side face of the key member 1 and is disposed at the free end of an elastically deformable arm 2 inclined with the one side face. The adjusting mechanism has a pressing member 9d disposed between the one side face and the arm 2 and a moving mechanism 8 for pressing the pressing member 9d to the arm 2 by moving the member.