Disclosed are a compressor in which a suction guide is provided between a gas suction tube of a casing and an inlet of a compression unit. The compressor includes a compression unit comprising an inlet for sucking gas and configured to compress the sucked gas; and a casing configured to accommodate the compression unit; and a suction guide comprising a passage for guiding the gas from an outside of the casing to the inlet, wherein the compression unit includes a first surface extending from an edge of the inlet, the suction guide includes a second surface extending from an edge of a vent of the passage, and provided in an internal area of the casing to make the first surface and the second surface face each other, and an external end of the first surface and an internal end of the second surface or an internal end of the first surface and an external end of the second surface do not overlap along a direction of an axis of the compressor.