A connector device comprising: a connector housing formed in an L shape and including a plurality of terminal accommodating chambers (12, 14) arranged in parallel along a connector height direction; a plurality of terminals accommodated in the plurality of terminal accommodating chambers; and a plurality of electric wires configured to be welded to the respective one of the plurality of terminals, wherein a lower cover, a middle cover and an upper cover are attached to the connector housing to be integrated, wherein a plurality of laser radiation through holes (15a, 16a, 16b, 17a, 17b, 17c) is formed in side walls (15, 16, 17), each forming the terminal accommodating chambers, the plurality of laser radiation through holes (15a, 16a, 16b, 17a, 17b, 17c) being configured to allow the plurality of terminals and the plurality of electric wires to be welded with each other inside the terminal accommodating chambers, and wherein the plurality of laser radiation through holes (15a, 16a, 16b, 17a, 17b, 17c) is configured to allow laser light emitted from a laser welding machine disposed outside the connector housing to enter one of the plurality of terminal accommodating chambers, wherein shapes of the plurality of terminal accommodating chambers are set such that positions at which portions to be welded (Px1, Px2, Px3) of the plurality of terminals are located are separated from each other, wherein welding portions (Px1, Px2, Px3) of the plurality of metal terminals having shifts from each other are displaced from each other in an insertion direction (Ay) in which the electric wires are inserted into the respective terminal accommodating chambers, the insertion direction corresponding to the connector height direction, wherein one laser radiation through hole is formed in the lower cover in the position facing a first welding portion, two laser radiation through holes (16a, 16b) are formed in the middle cover in the respective positions facing the first and a second welding portions, three laser radiation through holes (17a, 17b, 17c) are formed in the upper cover in the respective positions facing the first, the second and a third welding portions, wherein positions at which laser radiation through holes (15a, 16a, 17a) facing the same welding portion are located overlap each other in the laser radiation direction, and wherein the laser light passes through one or the plurality of the laser radiation through holes and reaches the portions to be welded (Px1, Px2) of the terminals. a connector housing formed in an L shape and including a plurality of terminal accommodating chambers (12, 14) arranged in parallel along a connector height direction; a plurality of terminals accommodated in the plurality of terminal accommodating chambers; and a plurality of electric wires configured to be welded to the respective one of the plurality of terminals, wherein a lower cover, a middle cover and an upper cover are attached to the connector housing to be integrated, wherein a plurality of laser radiation through holes (15a, 16a, 16b, 17a, 17b, 17c) is formed in side walls (15, 16, 17), each forming the terminal accommodating chambers, the plurality of laser radiation through holes (15a, 16a, 16b, 17a, 17b, 17c) being configured to allow the plurality of terminals and the plurality of electric wires to be welded with each other inside the terminal accommodating chambers, and wherein the plurality of laser radiation through holes (15a, 16a, 16b, 17a, 17b, 17c) is configured to allow laser light emitted from a laser welding machine disposed outside the connector housing to enter one of the plurality of terminal accommodating chambers, wherein shapes of the plurality of terminal accommodating chambers are set such that positions at which portions to be welded (Px1, Px2, Px3) of the plurality of terminals are located are separated from each other, wherein welding portions (Px1, Px2, Px3) of the plurality of metal terminals having shifts from each other are displaced from each other in an insertion direction (Ay) in which the electric wires are inserted into the respective terminal accommodating chambers, the insertion direction corresponding to the connector height direction, wherein one laser radiation through hole is formed in the lower cover in the position facing a first welding portion, two laser radiation through holes (16a, 16b) are formed in the middle cover in the respective positions facing the first and a second welding portions, three laser radiation through holes (17a, 17b, 17c) are formed in the upper cover in the respective positions facing the first, the second and a third welding portions, wherein positions at which laser radiation through holes (15a, 16a, 17a) facing the same welding portion are located overlap each other in the laser radiation direction, and wherein the laser light passes through one or the plurality of the laser radiation through holes and reaches the portions to be welded (Px1, Px2) of the terminals.