An armature has a plurality of armature cores arranged in a line in a first direction, coils wound on an area of the armature cores in a second direction, a carrier provided with a space in which to dispose the coils left in a third direction orthogonal to the first direction and the second direction with respect to the armature cores, and at least one mounting member to fix the armature cores and the carrier. The armature cores are fixed to the mounting member by first bolts, and the carrier is fixed to the mounting member by second bolts. The at least one mounting member, the first bolts, and the second bolts are disposed in positions not overlapping the coils when viewed from the third direction.