Abstract: An information input device that obtains information based on a touch position of an operation member on a touch panel includes a pressing-force detecting unit that detects pressing force of the operation member applied to the touch panel; an information acquisition unit that obtains information based on the touch position of the operation member on the touch panel when the pressing force of the operation member applied to the touch panel detected by the pressing-force detecting unit is equal to or greater than a determination reference value; and a determination-reference-value changing unit that changes the determination reference value from a first value to a second value smaller than the first value when the pressing force of the operation member applied to the touch panel detected by the pressing-force detecting unit becomes equal to or greater than the first value set as the determination reference value.