Provided is a technique whereby, in an input device in which a plurality of touch panels are arranged so as to be adjacent to one another, even if an upper limit number of input operations on the touch panels as a whole is less than the total number of input operations, an input operation with respect to the touch panels as a whole can be determined according to frequencies of input operations. The input device detects contact positions corresponding to input operations detected at fixed time intervals on each of the touch panels arranged so as to be adjacent to one another, and outputs contact positions the number of which is less than the sum of the numbers of the input operations detectable during the fixed time interval on the respective touch panels. Based on the contact positions corresponding to the input operations detected at fixed time intervals, the input device specifies frequencies of the input operations with respect to the touch panels, and among the contact positions corresponding to the input operations detected at fixed time intervals, preferentially determines the contact position on the touch panel with a greater frequency of the input operation as a contact position to be output.