A touch panel device (1) detecting a finger operation and a pen operation, the touch panel device includes: a touching object determining section (23) for determining whether or not a touch operation is the finger operation or the pen operation, depending on (a) whether or not a value outputted from a sensor is within a range indicated by a finger threshold value and (b) whether or not the value outputted from the sensor is within a range indicated by a pen threshold value, the touching object determining section (23) making no determination as to whether or not the touch operation in an Lp area is the pen operation but making a determination only as to whether or not the touch operation in the Lp area is the finger operation, depending on whether or not the value outputted from the sensor is in the range indicated by the finger threshold value.