A stator(2) of a rotating machine(1) includes a stator core (3), a plurality of winding wires wound on the stator core (3), a first bus ring(11u, 11v, 11w), a second bus ring(12), and a holder device. The first bus ring(11u, 11v, 11w) has a first radial dimension and selectively connects electrically with each of the wires. The second bus ring(12) has a second radial dimension different from the first radial dimension and selectively connects electrically with each of the wires. The holder device holds the first bus rings (11u, 11v, 11w) and the second bus ring (12). The holder device includes a first and a second support portion. The first support portion supports the first bus rings (11u, 11v, 11w) aligned along an axial direction of the stator core(3). The second support portion supports the second bus ring (12) on a radially outward or inward side of the first bus rings(11u, 11v, 11w).