A welding end positioning device (2), which is an example of a positioning device, includes a base member (10) for supporting a stator core (18), a positioning tool (4) arranged on the upper surface thereof, and a drive mechanism for driving the positioning member. (16) and The positioning tool (4) has a first plate (6) and a second plate (8). The first plate (6) has an inner diameter ring (32) and an annular plate body (36) fixed to its upper surface, and the second plate (8) is fixed to the outer diameter ring (38) and its upper surface. A plate body (42). The plate body (36) and the plate body (42) are formed with insertion holes (62, 62 ') into which the pair of tip portions (22) is individually partitioned and inserted, and these plate bodies (36, 42) are formed. ) Is rotated in the opposite direction for positioning. The respective tip pairs (22) are aligned in the radial direction without the positioning tool (4), and then the positioning tool (4) is set.
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