An external mirror device includes a housing arranged at a side of a vehicle and having an opening facing rearward of vehicle, a mirror accommodated in the opening of the housing, and a camera arranged at the housing and configured to acquire information from outside of the vehicle. With respect to the position of the camera in the front-rear direction, the camera is arranged in a rear of a contour line which includes an outline of the housing when seen from a rear of the vehicle. The housing includes a separating portion having a concave-convex shape to separate air traveling on a surface of the housing, and the separating portion is arranged at a same position as the camera in a direction along the contour line, and arranged frontward of the contour line.