An electronic device according to an embodiment include a first antenna, a second antenna, a first capacitor connected to the first antenna, a second capacitor connected to the second antenna, a grip sensor connected to the first antenna through a first electrical path and connected to the second antenna through a second electrical path and at least one processor, wherein at least one processor is configured to identify that a changed value of a first capacitance, caused by the first antenna, obtained through the grip sensor to identify whether the electronic device is gripped, is maintained within a specified range, based on identifying that the changed value of the first capacitance is maintained within the specified range, obtain a changed value of the second capacitance, caused by the second antenna, and based on the changed value of the second capacitance, identify whether the electronic device is gripped.