An electronic device module includes a wiring board having a first surface including first and second electrodes formed thereon and a second surface opposite to the first surface, a supporting member attached to the second surface of the wiring board, a first electronic unit mounted on the first surface of the wiring board and electrically connected to the first electrode, and a second electronic unit mounted on the first surface of the wiring board and electrically connected to the second electrode. The wiring board includes a wiring extending from the first electronic unit to a position closer to the second electronic unit, and a reinforcement layer disposed between the first and second electronic units and apart from the wiring in a thickness direction of the wiring board.