An electronic pedometer has a case, a main circuit board mounted on the case and supporting an electronic circuit element for signal processing, and a sub-circuit board separate and independent from the main circuit board and mounted to a portion of the case. An acceleration sensor is mounted on the sub-circuit board for detecting a walk of a user and outputting a walk signal corresponding to the walk. A flexible conductive member electrically connects the main circuit board and the sub-circuit board to one another.