Abstract: A receiver drier includes a case having one open end and a closed end, and a cover member fixed to the open end of the case by welding to close the open end. A liquid refrigerant suction pipe is arranged in an inner space of the case and extends from a position which is located near to the open end of the case toward an inner portion of the case. A liquid refrigerant inlet hole for introducing a refrigerant into the inner space of the case, a liquid refrigerant outlet hole for leading the refrigerant from the suction pipe to an out of the case, and a connecting passage for connecting the refrigerant outlet hole with one end of the suction pipe which is located near to the opening end of the case are provided in the cover member. The cover member is thinned with at least a portion thereof corresponding to the connecting passage being remaining.