An instruction input apparatus comprising: a display being provided with a display screen; an electrostatic touch panel being deposited on the front of the display screen on the display, the touch panel being configured to input instructions to the instruction input apparatus; an approach sensor being configured to detect a user's hand approaching to a part of frame of the touch panel; a coordinate identification portion being configured to identify the coordinate of a contact position at which the user touches on the touch panel; and a controller being configured to, if the approach sensor detects the user's hand approaching to the part of frame of the touch panel, change a contact detectable area of the touch panel so that the contact detectable area will exclude the coordinate of the user's contact position which is identified by the coordinate identification portion.