A rotary compressor including a cylindrical compressor housing provided with an inlet unit of a refrigerant and a discharging unit of the refrigerant, a compressing unit which is disposed inside the compressor housing and includes a cylinder and a piston for compressing the refrigerant sucked in from the inlet portion, a rotation shaft provided with the piston of the compressing unit, and a motor which includes a cylindrical stator and a rotor that is provided on another end side of the rotation shaft and that rotates inside the stator, and which drives the compressing unit via the rotation shaft, in which an outer circumferential portion of the stator includes a concave portion and is fixed to an inner circumferential portion of the compressor housing in a transition fit state, and in which the compressor housing includes a weld portion which is joined to the concave portion of the stator.