A scroll compressor, comprising: a casing; a high/low pressure separation plate configured to divide an inner space of the casing into a low-pressure part and a high-pressure part; a refrigerant suction pipe communicating with the low-pressure part through the casing; a refrigerant discharge pipe communicating with the high-pressure part through the casing; a driving motor installed inside the low-pressure part; an orbiting scroll coupled to the driving motor through a rotating shaft to perform an orbiting motion; a non-orbiting scroll engaged with the orbiting scroll to form a compression chamber, and having a suction port formed through an outer circumferential surface thereof to communicate with the compression chamber, wherein the suction port is disposed vertically higher than the center of an outlet end of the refrigerant suction pipe; and a suction guide having a suction passage to guide refrigerant suctioned into the low-pressure part toward the compression chamber, wherein the suction guide comprises a passage inlet defining one end of the suction passage and being downwardly open, and a passage outlet defining another end of the suction passage and open toward the suction port, wherein the suction guide is made of a material having lower thermal conductivity than that of the non-orbiting scroll; and wherein the suction passage of the suction guide is disposed to communicate between the outlet end of the refrigerant suction pipe and the suction port; characterized in that the non-orbiting scroll comprises a suction guide protrusion accommodating the suction port and extending radially toward an inner circumferential surface of the casing, wherein the inner circumferential surface of the suction guide protrusion is defining a guide accommodating portion which is recessed vertically upward, and wherein the suction guide is inserted into the guide accommodating portion. a casing; a high/low pressure separation plate configured to divide an inner space of the casing into a low-pressure part and a high-pressure part; a refrigerant suction pipe communicating with the low-pressure part through the casing; a refrigerant discharge pipe communicating with the high-pressure part through the casing; a driving motor installed inside the low-pressure part; an orbiting scroll coupled to the driving motor through a rotating shaft to perform an orbiting motion; a non-orbiting scroll engaged with the orbiting scroll to form a compression chamber, and having a suction port formed through an outer circumferential surface thereof to communicate with the compression chamber, wherein the suction port is disposed vertically higher than the center of an outlet end of the refrigerant suction pipe; and a suction guide having a suction passage to guide refrigerant suctioned into the low-pressure part toward the compression chamber, wherein the suction guide comprises a passage inlet defining one end of the suction passage and being downwardly open, and a passage outlet defining another end of the suction passage and open toward the suction port, wherein the suction guide is made of a material having lower thermal conductivity than that of the non-orbiting scroll; and wherein the suction passage of the suction guide is disposed to communicate between the outlet end of the refrigerant suction pipe and the suction port; characterized in that the non-orbiting scroll comprises a suction guide protrusion accommodating the suction port and extending radially toward an inner circumferential surface of the casing, wherein the inner circumferential surface of the suction guide protrusion is defining a guide accommodating portion which is recessed vertically upward, and wherein the suction guide is inserted into the guide accommodating portion.