An electromagnetic switch includes an excitation coil that forms an electromagnet by energizing, a movable core driven by a magnetism generated in the excitation coil, a cylindrical frame having a bottom that accommodates the excitation coil and constitutes a part of a magnetic circuit of the excitation coil, an end plate electrically connected with the frame, and diodes electrically connected with the excitation coil in parallel. In addition, at least one of terminals of the diodes is fixed to the end plate.