A door mirror, comprising: a mirror housing (2, 302) that is provided in a side portion of a vehicle body; a camera unit (30, 330) that is accommodated inside the mirror housing and captures an image of a rear side in a traveling direction of the vehicle body; a cut filter that reduces a quantity of light incident on the camera unit; and a heater that is provided on a surface of the cut filter on the camera unit side and is capable of heating the cut filter, characterized in that the camera unit (30, 330) is disposed such that a central axis intersects a surface direction of the cut filter, wherein the camera unit and the heater are disposed adjacent to each other; wherein the camera unit has at least two cameras (31, 32), which are: a first camera (31, 331) which captures an image of the rear side in the traveling direction including a part of the vehicle body, and a second camera (32, 332) which captures an image of a range including a side further outward in a vehicle width direction of the vehicle body than an image-capturing range of the first camera (31, 331), wherein the first camera (31, 331) and the second camera (32, 332) are disposed to partially overlap each other when viewed in a height direction of the vehicle body, and wherein, one of the first and second cameras is positioned further outward in the vehicle width direction than the other camera, and above said other camera. a mirror housing (2, 302) that is provided in a side portion of a vehicle body; a camera unit (30, 330) that is accommodated inside the mirror housing and captures an image of a rear side in a traveling direction of the vehicle body; a cut filter that reduces a quantity of light incident on the camera unit; and a heater that is provided on a surface of the cut filter on the camera unit side and is capable of heating the cut filter, characterized in that the camera unit (30, 330) is disposed such that a central axis intersects a surface direction of the cut filter, wherein the camera unit and the heater are disposed adjacent to each other; wherein the camera unit has at least two cameras (31, 32), which are: a first camera (31, 331) which captures an image of the rear side in the traveling direction including a part of the vehicle body, and a second camera (32, 332) which captures an image of a range including a side further outward in a vehicle width direction of the vehicle body than an image-capturing range of the first camera (31, 331), wherein the first camera (31, 331) and the second camera (32, 332) are disposed to partially overlap each other when viewed in a height direction of the vehicle body, and wherein, one of the first and second cameras is positioned further outward in the vehicle width direction than the other camera, and above said other camera. a first camera (31, 331) which captures an image of the rear side in the traveling direction including a part of the vehicle body, and a second camera (32, 332) which captures an image of a range including a side further outward in a vehicle width direction of the vehicle body than an image-capturing range of the first camera (31, 331), wherein the first camera (31, 331) and the second camera (32, 332) are disposed to partially overlap each other when viewed in a height direction of the vehicle body, and wherein, one of the first and second cameras is positioned further outward in the vehicle width direction than the other camera, and above said other camera.