An electronic apparatus include a housing, a circuit board held in the housing, and large electronic components held in the housing and electrically coupled to the circuit board. The housing has a mounting surface, and the electronic apparatus is mounted to an object at the mounting surface. The large electronic components are arranged in a three-dimensional manner with respect to the mounting surface in such a manner that at least one of the large electronic components overlaps at least one of the large electronic components in a direction toward the mounting surface.