The invention concerns an electrical connection device (1) designed to be implanted inside an animal's body to provide an electrical connection between several electrical wires, characterized in that it comprises: a housing (10) comprising at least one opening (11) formed at the surface of said housing (10) at the end of at least one cavity formed inside the housing (10), said cavity being designed to receive a first electrical wire through opening (11); electrical interconnection means (8) to establish an electrical connection between said first electrical wire and at least one second electrical wire; a means for maintaining the position of the first electrical wire in the corresponding cavity, said position maintenance means having a cam (13) rotatably mounted in the housing to compress said first electrical wire against the inner walls of the cavity during rotation of cam (13) in a direction tending to insert said first electrical wire inside the corresponding cavity.