An electronic apparatus of the present invention includes an operating portion formed by a non-conductive material, a rotating plate configured to rotate in accordance with a rotational operation of the operating portion, a substrate including a first sensing electrode whose capacitance changes by a touch operation to the operating portion and a plurality of second sensing electrodes whose potential changes by a rotation of the rotating plate on a surface different from a surface on which the first sensing electrode is disposed, and a detector configured to detect the capacitance of the first sensing electrode and the rotational operation of the operating portion based on an output from the plurality of second sensing electrodes. A protruding portion that protrudes toward the first sensing electrode is formed on the operating portion, and the protruding portion is formed on a lightening portion on a back side of the operating portion.