A connection terminal configured to be mated with a counter male terminal (Tm) comprising: a terminal main body that is made of a conductive material and has a female connector provided with a columnar internal space into which a male connector of the counter male terminal (Tm) can be inserted and a wire connector to which a conducting part (Cw) of a wire can be electrically connected; and a contact member that is made of a conductive material, is arcuate curved and is accommodated into the internal space along a part in a circumferential direction of an inner circumferential face of the female connector so that the contact member faces about half the area in the circumferential direction of the inner circumferential face of the female connector, and is electrically connected to the female connector, and is configured to be electrically connected to the male connector inserted into the internal space from an opening serving as a male terminal insertion port of the female connector, wherein the contact member is formed along the part in the circumferential direction of the inner circumferential face of the female connector and includes at least one first locked part and at least one second locked part, characterized in that the female connector includes a first locking part that is arranged on a side of the female connector in an insertion direction of the male connector into the internal space relative to the first locked part of the contact member after completion of being accommodated into the internal space and that locks movement of the first locked part to the side in the insertion direction in order to maintain an accommodated state of the contact member in the internal space, and a second locking part that is arranged on a side of the female connector in a removal direction of the male connector opposite to the insertion direction relative to the second locked part of the contact member after the completion of being accommodated and that locks movement of the second locked part to the side in the removal direction in order to maintain the accommodated state of the contact member in the internal space, and that the first locking part is a wall of a notch in the insertion direction of the male connector in a insertion/removal direction of the male connector, the notch being provided at an end on the opening. a terminal main body that is made of a conductive material and has a female connector provided with a columnar internal space into which a male connector of the counter male terminal (Tm) can be inserted and a wire connector to which a conducting part (Cw) of a wire can be electrically connected; and a contact member that is made of a conductive material, is arcuate curved and is accommodated into the internal space along a part in a circumferential direction of an inner circumferential face of the female connector so that the contact member faces about half the area in the circumferential direction of the inner circumferential face of the female connector, and is electrically connected to the female connector, and is configured to be electrically connected to the male connector inserted into the internal space from an opening serving as a male terminal insertion port of the female connector, wherein the contact member is formed along the part in the circumferential direction of the inner circumferential face of the female connector and includes at least one first locked part and at least one second locked part, characterized in that the female connector includes a first locking part that is arranged on a side of the female connector in an insertion direction of the male connector into the internal space relative to the first locked part of the contact member after completion of being accommodated into the internal space and that locks movement of the first locked part to the side in the insertion direction in order to maintain an accommodated state of the contact member in the internal space, and a second locking part that is arranged on a side of the female connector in a removal direction of the male connector opposite to the insertion direction relative to the second locked part of the contact member after the completion of being accommodated and that locks movement of the second locked part to the side in the removal direction in order to maintain the accommodated state of the contact member in the internal space, and that the first locking part is a wall of a notch in the insertion direction of the male connector in a insertion/removal direction of the male connector, the notch being provided at an end on the opening.