A touch operation detection apparatus includes a touch pad that has an operation surface touchable by an operator's body, and has a plurality of electrostatic sensors incorporated therein each of which detects electrostatic capacitance that is variable according to a touch on the operation surface; a number-of-touched-point determination part that determines whether the number of touched points at which touches are made on the operation surface of the touch pad is greater than or equal to 2 based on signals from the electrostatic sensors; and a sensitivity adjustment execution part that executes a sensitivity adjustment concerning the touch against the operation surface of the touch pad when the number-of-touched-point determination part determines that the number of touched points is greater than or equal to 2.