Provided are a coil assembling apparatus, a coil assembling method and a manufacturing apparatus of the electrical rotating machine, whereby it is possible to efficiently and quickly assemble a coil consisting of a plurality of coil segments, and to easily and quickly assemble a coil consisting of a multilayered coil segments. The coil assembling apparatus includes a transport means for transporting in sequence a plurality of coil segments, each of the plurality of coil segments consisting of a pair of slot insertion portions extending substantially in parallel with each other and a linking portion for coupling the pair of slot insertion portions, a segment arrangement body capable of rotating around a center axis thereof and provided with a plurality of segment hold portions annularly arranged along a circumferential direction of the segment arrangement body, into which the plurality of coil segments transported by the transport means can be respectively inserted from an outer radial directions of the segment arrangement body, and a guide means for guiding to insert one slot insertion portion of the pair of slot insertion portions of each of the coil segments into one of the segment hold portions each time the segment arrangement body rotates by a first predetermined angle, and for guiding to insert the other one slot insertion portion of the pair of slot insertion portions into the other one of the segment hold portions when the segment arrangement body rotates by a second predetermined angle from the insertion of the one slot insertion portion.
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