PURPOSE: To reduce fatigue by decreasing the backward bending of an input hand at the time of operating the input of a keyboard by providing a main body part arranged at the palm for inputting and a mounting and fixing means to mount and fix the main body part to the input hand.

CONSTITUTION: The thumb of an input hand M is inserted to a ring part 33, and a main body part 31 is put on the palm. Then, a fixing belt 32 is pulled in the direction of the thumb and inserted through the inside of the ring part 33. Further, the fixing belt 32 is bent in the opposite direction, attaching/ detaching parts 32a and 32b are joined, and the fixing belt 32 is fixed. Next, when the hand placing device for keyboard input operation is mounted at the input hand M by the fixing belt in the case of performing the input operation to the keyboard, the keyboard and the hand placing device for keyboard input operation, namely, the positions of the respective fingers of the input hand M in the case of performing the input operations are set at the almost same height. Therefore, the backward bending of the wrist at the time of input operations is reduced, the fatigue at the time of input operations to the keyboard can be reduced, and input efficiency can be improved.