Disclosed herein are an apparatus and method for automatically calibrating capacitance per channel, for measuring parasitic capacitance values of respective channels due to a difference in a length of a wiring of each capacitance sensing channel when a circuit is designed and adding a unique calibration capacitance value of each channel such that all channels have the same reference capacitance value that is preset, and in detail, the apparatus for automatically calibrating a capacitance per channel includes a touch sensing device including a plurality of touch sensing regions, and a capacitance measurement and calibration device configured to measure parasitic capacitances of channels connected to the plurality of touch sensing regions, respectively, and to add a unique calibration capacitance of each channel to a corresponding channel to acquire a preset reference capacitance when each channel is connected to the parasitic capacitance.