A breast massage device includes a main body; a drive unit installed within the main body; and a massage disk mounted on the main body and coupled with the drive unit so as to be driven rotatably thereby. The massage disk has a central axis, a concave surface for covering a breast, and a periphery confining the concave surface, wherein the periphery has a highest point and a lowest point located at two opposite sides of the central axis such that a portion of the concave surface extending from the highest point toward the central axis is longer in curved distance than another portion of the concave surface extending from the lowest point to the central axis. A plurality of massage elements are mounted rotatably on the concave surface such that the massage elements are rotatable relative to the concave surface when the drive unit is activated.