A connector comprising: a housing configured to house therein a terminal (T) along an axial direction (X); a front holder assembled to an end portion in the axial direction (X) of the housing , the front holder being configured to hold the terminal (T) between the housing and the front holder in the axial direction (X); and a restriction member assembled to the housing , wherein the housing or the front holder includes a latch claw portion configured to latch the housing and the front holder , the other of the housing and the front holder includes a latch arm portion extending along the axial direction (X), the latch arm portion being configured to be latched to the latch claw portion in a state where the housing and the front holder are assembled, and the restriction member includes, in a state of being assembled to the housing , a restriction piece that is located adjacent to the latch arm portion that is in a state of being latched to the latch claw portion , the restriction piece being configured to restrict displacement of the latch arm portion toward a latch release side, characterized in that the housing includes an opening formed at an end portion on the opposite side to the front holder side in the axial direction (X) and a wiring-material insertion portion that is formed so as to project toward one side along a height direction (Z) orthogonal to the axial direction (X) from the end portion on the opposite side to the front holder side in the axial direction (X) and is a portion through which a wiring material (W) electrically connected to the terminal (T) is configured to be inserted along the height direction (Z), and the restriction member is a rear cover that is assembled to the opening separately from the front holder and closes the opening . a housing configured to house therein a terminal (T) along an axial direction (X); a front holder assembled to an end portion in the axial direction (X) of the housing , the front holder being configured to hold the terminal (T) between the housing and the front holder in the axial direction (X); and a restriction member assembled to the housing , wherein the housing or the front holder includes a latch claw portion configured to latch the housing and the front holder , the other of the housing and the front holder includes a latch arm portion extending along the axial direction (X), the latch arm portion being configured to be latched to the latch claw portion in a state where the housing and the front holder are assembled, and the restriction member includes, in a state of being assembled to the housing , a restriction piece that is located adjacent to the latch arm portion that is in a state of being latched to the latch claw portion , the restriction piece being configured to restrict displacement of the latch arm portion toward a latch release side, characterized in that the housing includes an opening formed at an end portion on the opposite side to the front holder side in the axial direction (X) and a wiring-material insertion portion that is formed so as to project toward one side along a height direction (Z) orthogonal to the axial direction (X) from the end portion on the opposite side to the front holder side in the axial direction (X) and is a portion through which a wiring material (W) electrically connected to the terminal (T) is configured to be inserted along the height direction (Z), and the restriction member is a rear cover that is assembled to the opening separately from the front holder and closes the opening . <EOS>