A sheathing member comprising: a plurality of tubular units into each of which a wiring material having conductivity is inserted; and a connecting unit configured to connect respective open ends of the tubular units with each other, characterized in that the tubular units respectively include lap portions in which the open ends to be connected overlap each other along a diameter direction, the connecting unit includes a projection that is provided in the lap portion of one of the tubular units to be connected and projects along the diameter direction, and a groove unit through which the projection is passed, the groove unit being provided in the lap portion of the other of the tubular units to be connected and including a first groove extending from the open end along an axis direction and a second groove extending from an axially-extended end of the first groove along a circumference direction, the groove unit of the connecting unit is provided as a projecting groove that is formed in a portion projecting along the diameter direction in the lap portion of the other of the tubular units to be connected, the connecting unit further includes a locking unit formed in an entrance of the second groove where the direction of the groove unit is changed from the direction along the first groove to a circumference direction, and formed so as to make a diametrical depth of the second groove shallower than a diametrical dimension of the projection that is to be passed through the second groove, the locking unit thereby retains the projection in the second groove of the groove unit, and a projecting end is configured to form in a shape of an arc along a circumference direction, and a groove bottom of the second groove also is configured to form in a shape of an arc along a circumference direction in accordance with the projecting end. a plurality of tubular units into each of which a wiring material having conductivity is inserted; and a connecting unit configured to connect respective open ends of the tubular units with each other, characterized in that the tubular units respectively include lap portions in which the open ends to be connected overlap each other along a diameter direction, the connecting unit includes a projection that is provided in the lap portion of one of the tubular units to be connected and projects along the diameter direction, and a groove unit through which the projection is passed, the groove unit being provided in the lap portion of the other of the tubular units to be connected and including a first groove extending from the open end along an axis direction and a second groove extending from an axially-extended end of the first groove along a circumference direction, the groove unit of the connecting unit is provided as a projecting groove that is formed in a portion projecting along the diameter direction in the lap portion of the other of the tubular units to be connected, the connecting unit further includes a locking unit formed in an entrance of the second groove where the direction of the groove unit is changed from the direction along the first groove to a circumference direction, and formed so as to make a diametrical depth of the second groove shallower than a diametrical dimension of the projection that is to be passed through the second groove, the locking unit thereby retains the projection in the second groove of the groove unit, and a projecting end is configured to form in a shape of an arc along a circumference direction, and a groove bottom of the second groove also is configured to form in a shape of an arc along a circumference direction in accordance with the projecting end. a projection that is provided in the lap portion of one of the tubular units to be connected and projects along the diameter direction, and a groove unit through which the projection is passed, the groove unit being provided in the lap portion of the other of the tubular units to be connected and including a first groove extending from the open end along an axis direction and a second groove extending from an axially-extended end of the first groove along a circumference direction, a first groove extending from the open end along an axis direction and a second groove extending from an axially-extended end of the first groove along a circumference direction, the groove unit of the connecting unit is provided as a projecting groove that is formed in a portion projecting along the diameter direction in the lap portion of the other of the tubular units to be connected, the connecting unit further includes a locking unit formed in an entrance of the second groove where the direction of the groove unit is changed from the direction along the first groove to a circumference direction, and formed so as to make a diametrical depth of the second groove shallower than a diametrical dimension of the projection that is to be passed through the second groove, the locking unit thereby retains the projection in the second groove of the groove unit, and a projecting end is configured to form in a shape of an arc along a circumference direction, and a groove bottom of the second groove also is configured to form in a shape of an arc along a circumference direction in accordance with the projecting end.