Electrical connector comprising: a first (1, 10) and a second (2, 20) connector member, which can be coupled to each other, and a connector position assurance element (3, 30) slidably mountable on the first (1, 10) connector member, said connector position assurance element (3, 30) having a first, preliminary mounting position on said first (1, 10) connector member, in which said connector position assurance element (3, 30) cannot advance further since it comes into engagement with a stop surface (1a, 18b) of the first connector member (1, 10), if the second (2, 20) connector member is not yet coupled therewithin, said connector position assurance element (3, 30) having a second, final position which can be reached only after a complete coupling of the two connector members, said connector position assurance element has at least a first engagement portion which cooperates with said stop surface (1a, 18b) of said first connector member in said first preliminary mounting position in such a manner that, when said first and said second connector members are correctly coupled to each other, it is possible to activate said connector position assurance element and to bring it into the final position; and said connector position assurance element further has at least a second engagement portion spaced from the first engagement portion in a longitudinal direction of the position assurance element, wherein, in the final position, said connector position assurance element (3, 30) engages with a stop element (2a, 20b) of the second connector member, and wherein the second engagement portion cooperates with said stop element (2a, 20b) of said second connector member in said second, final position; characterized in that in the first preliminary mounting position, the second engagement portion engages with a protruding central element of said first connector member (1, 10). a first (1, 10) and a second (2, 20) connector member, which can be coupled to each other, and a connector position assurance element (3, 30) slidably mountable on the first (1, 10) connector member, said connector position assurance element (3, 30) having a first, preliminary mounting position on said first (1, 10) connector member, in which said connector position assurance element (3, 30) cannot advance further since it comes into engagement with a stop surface (1a, 18b) of the first connector member (1, 10), if the second (2, 20) connector member is not yet coupled therewithin, said connector position assurance element (3, 30) having a second, final position which can be reached only after a complete coupling of the two connector members, said connector position assurance element has at least a first engagement portion which cooperates with said stop surface (1a, 18b) of said first connector member in said first preliminary mounting position in such a manner that, when said first and said second connector members are correctly coupled to each other, it is possible to activate said connector position assurance element and to bring it into the final position; and said connector position assurance element further has at least a second engagement portion spaced from the first engagement portion in a longitudinal direction of the position assurance element, wherein, in the final position, said connector position assurance element (3, 30) engages with a stop element (2a, 20b) of the second connector member, and wherein the second engagement portion cooperates with said stop element (2a, 20b) of said second connector member in said second, final position; characterized in that in the first preliminary mounting position, the second engagement portion engages with a protruding central element of said first connector member (1, 10).