A rotary compressor, comprising: a casing in which a suction pipe communicates with an inner space thereof; a cylinder fixedly coupled to an inner space of the casing, and provided with an inner circumferential surface forming a compression space; a first bearing and a second bearing provided on both upper and lower sides of the cylinder to form the compression space together with the cylinder; a roller provided eccentrically with respect to an inner circumferential surface of the cylinder to vary a volume of the compression space while rotating; and a vane inserted into the roller to rotate together with the roller, and drawn out toward the inner circumferential surface of the cylinder during the rotation of the roller to partition the compression space into a plurality of compression chambers (333a, 333b, 333c), wherein a suction passage communicating with the compression space is formed in the first bearing or the second bearing, and a suction port communicating between the suction passage and the compression space is formed on a side surface of the cylinder, wherein a suction guide pipe is provided between the suction passage and the suction pipe in the suction space of the casing, characterised in that one end of the suction guide pipe is connected to the suction pipe and the other end thereof is provided to correspond to the suction passage, and wherein the other end of the suction guide pipe is spaced apart from the suction passage by a predetermined distance (t), the other end of the suction guide pipe is formed with an expansion portion having an inner diameter larger than that of the one end of the suction guide pipe and a flange-shaped portion extending on the outer circumferential surface of the expansion portion. a casing in which a suction pipe communicates with an inner space thereof; a cylinder fixedly coupled to an inner space of the casing, and provided with an inner circumferential surface forming a compression space; a first bearing and a second bearing provided on both upper and lower sides of the cylinder to form the compression space together with the cylinder; a roller provided eccentrically with respect to an inner circumferential surface of the cylinder to vary a volume of the compression space while rotating; and a vane inserted into the roller to rotate together with the roller, and drawn out toward the inner circumferential surface of the cylinder during the rotation of the roller to partition the compression space into a plurality of compression chambers (333a, 333b, 333c), wherein a suction passage communicating with the compression space is formed in the first bearing or the second bearing, and a suction port communicating between the suction passage and the compression space is formed on a side surface of the cylinder, wherein a suction guide pipe is provided between the suction passage and the suction pipe in the suction space of the casing, characterised in that one end of the suction guide pipe is connected to the suction pipe and the other end thereof is provided to correspond to the suction passage, and wherein the other end of the suction guide pipe is spaced apart from the suction passage by a predetermined distance (t), the other end of the suction guide pipe is formed with an expansion portion having an inner diameter larger than that of the one end of the suction guide pipe and a flange-shaped portion extending on the outer circumferential surface of the expansion portion.