A rotor of an electric motor includes a laminated armature core, a shaft, magnets arranged on the circumference of the laminated armature core, and a plastic overmold. The laminated armature core has at least one associated channel on the circumference of the laminated armature core for each magnet. The channels extend parallel to the shaft, and the laminated armature core has radially oriented webs on the circumference. The webs (8) extend parallel to the shaft and a magnet (9) is arranged between each pair of webs (8), and the plastic overmold (4) encloses the laminated armature core (1) and the magnets (3) to such an extent that only the radial outer face of the magnets (3) is free of plastic (4).