A power reception device (1, 1A, 1B) comprising: a coil; an electric unit electrically connected to the coil; and a metal case disposed to be adjacent to the coil, the metal case being configured to accommodate the electric unit, wherein the electric unit includes at least one active element (44, 48), the metal case includes an inner-side wall and an outer-side wall, the inner-side wall is adjacent to the coil, the outer-side wall is positioned such that the inner-side wall is positioned between the coil and the outer-side wall, and the at least one active element (44, 48) is provided at a position closer to the outer-side wall than to the inner-side wall, the electric unit including a filter including a filter coil (31a, 31b) connected to the coil, a rectifier electrically connected to the filter by a first electric power line and a second electric power line, a protection circuit electrically connected to the first electric power line and the second electric power line, and a converter electrically connected to the rectifier, the protection circuit including a protection controller configured to control driving of the protection circuit by switching between a state in which the first electric power line and the second electric power line are electrically connected, and a state in which the electric connection between the first electric power line and the second electric power line is cut, and a converter controller configured to control driving of the converter, and a distance between the converter controller and the filter coil (31a, 31b) being longer than a distance between the protection controller and the filter coil (31a, 31b). a coil; an electric unit electrically connected to the coil; and a metal case disposed to be adjacent to the coil, the metal case being configured to accommodate the electric unit, wherein the electric unit includes at least one active element (44, 48), the metal case includes an inner-side wall and an outer-side wall, the inner-side wall is adjacent to the coil, the outer-side wall is positioned such that the inner-side wall is positioned between the coil and the outer-side wall, and the at least one active element (44, 48) is provided at a position closer to the outer-side wall than to the inner-side wall, the electric unit including a filter including a filter coil (31a, 31b) connected to the coil, a rectifier electrically connected to the filter by a first electric power line and a second electric power line, a protection circuit electrically connected to the first electric power line and the second electric power line, and a converter electrically connected to the rectifier, a filter including a filter coil (31a, 31b) connected to the coil, a rectifier electrically connected to the filter by a first electric power line and a second electric power line, a protection circuit electrically connected to the first electric power line and the second electric power line, and a converter electrically connected to the rectifier, the protection circuit including a protection controller configured to control driving of the protection circuit by switching between a state in which the first electric power line and the second electric power line are electrically connected, and a state in which the electric connection between the first electric power line and the second electric power line is cut, and a converter controller configured to control driving of the converter, and a protection controller configured to control driving of the protection circuit by switching between a state in which the first electric power line and the second electric power line are electrically connected, and a state in which the electric connection between the first electric power line and the second electric power line is cut, and a converter controller configured to control driving of the converter, and a distance between the converter controller and the filter coil (31a, 31b) being longer than a distance between the protection controller and the filter coil (31a, 31b).