After passing through respective contact insertion holes 3A to 3E of a guide connector 3 and penetrating the substrate 110, the contacts 120 are inserted into a female housing 10. After the electrical connection between the contacts 120 and female contacts 20 are respectively established, a slider 1 is pressed down, which causes pressing pins 4 and 5 to press a first movable body 50 and a second movable body 60. With this, a lower stage 50L of the first movable body 50 and a lower stage 60L of the second movable body 60 detach from restriction beams 84 and 85. This allows springs 141 and 142 to extend, to move the first movable body 50 and the second movable body 60 away from the contacts 120.