GESTURE INPUT SYSTEM AND GESTURE INPUT METHOD

A gesture input system (100) that accepts a user operation based on a motion of a portion of the body of a user and that produces an input signal indicating a direction of the motion and/or an amount of the motion of the portion of the body, includes a sensor (1) that detects the motion of the portion of the body of the user, a tactile feeling presenting apparatus (3) that presents a tactile feeling at a base point (61) set inside a space, and a control apparatus (2) that sets a chasing point on the portion (50) of the body detected by the sensor and that produces the input signal based on a variation of the relative positional relation between the chasing point and the base point. The tactile feeling presenting apparatus (3) continuously presents the tactile feeling at the base point (61) during a time period for the gesture input system to be in an input acceptable state where the gesture input system is able to accept the user operation.