A micro electromechanical system connecter includes a u-shaped plug connecter and a socket connector. The plug connecter includes two opposite substrates and a spacing element sandwiched therebetween and positioned at one ends of the two substrates. Two parallel grooves are defined in outer surfaces of the two substrates at the other ends the two substrates. A plurality of parallel first electrodes formed on the outer surfaces of the two substrates and configured to extend along a direction perpendicular to grooves. The socked connecter includes a base having a top surface. A recess is defined in the top surface. Two protrusions are respectively formed on two internal walls of the recess adjacent to the entrance of the recess. A plurality of parallel second electrodes formed on the base according to the first electrodes. Each second electrode extends from the top surface of the base to one of the two internal walls of the recess.