A wall-mounted microwave oven including a fixing member having an improved structure for fixing an oven body to a vertical wall. The wall-mounted microwave oven achieves a reduction in manufacturing costs and convenient and simple manufacturing, transporting and installing processes. The wall-mounted microwave oven also includes a sheet adapted to set an accurate mounting position for the fixing member, in which the sheet has a size corresponding to that of the oven body and is made of paper or a similar material. The fixing member is provided with fixing holes. The sheet is provided with fixing position marks indicating fixing positions where screws have to be fastened to the wall through respective fixing holes. The fixing member is also provided with hooks respectively engaged with hook holes formed at a lower end of the oven body.