An electrical plug connector includes an insulated housing and a metallic shell. The insulated housing includes a base member, an upper portion, a lower portion and defines a mating room between the upper portion and the lower portion. The upper portion and the lower portion are extending from one side of the base member. The metallic shell encloses the insulated housing, and includes a front shell and a rear shell. The front shell includes a front cover portion and a rear cover portion. The rear cover portion is extending from a rear side of the front cover portion. The rear shell encloses the front side of the base member and includes a front extending plate propped on the rear cover portion, so that the front shell and the rear shell are fixed with each other.