A scroll compressor, comprising: a casing having a cylindrical barrel and a lid attached to an axial end of the barrel; a compression mechanism having a fixed scroll and a movable scroll, and being housed in the casing; and a suction passage sending a fluid outside the casing into a compression chamber of the compression mechanism, wherein the fixed scroll includes a fixed-side end plate, a fixed-side wrap standing upright on the fixed-side end plate, and a suction hole formed in a portion corresponding to an outermost portion of the fixed-side wrap, the suction hole being capable of communicating with the compression chamber, the suction passage includes an insertion pipe portion (65, 91) inserted into a through hole of the lid of the casing, and an in-plate passage (73, 92, 94) formed in the fixed-side end plate and having an outflow opening opened toward the suction hole, a center of the through hole is closer to an axis of the barrel than a center of the outflow opening of the in-plate passage (73, 92, 94), the suction passage includes an introduction pipe, a main suction pipe, and a coupling pipe arranged sequentially from the upstream to downstream of a flow of a refrigerant, the main suction pipe extends linearly and vertically so as to be coaxial with the center of the through hole, the coupling pipe includes a first pipe portion and a second pipe portion, the protruding portion of the main suction pipe is connected to the first pipe portion, the first pipe portion is coaxial with the main suction pipe, the second pipe portion is further shifted radially outward than the first pipe portion with reference to the axis of the barrel of the casing, and the second pipe portion constitutes a downstream pipe portion which extends vertically to be coaxial with the center of the outflow opening. a casing having a cylindrical barrel and a lid attached to an axial end of the barrel; a compression mechanism having a fixed scroll and a movable scroll, and being housed in the casing; and a suction passage sending a fluid outside the casing into a compression chamber of the compression mechanism, wherein the fixed scroll includes a fixed-side end plate, a fixed-side wrap standing upright on the fixed-side end plate, and a suction hole formed in a portion corresponding to an outermost portion of the fixed-side wrap, the suction hole being capable of communicating with the compression chamber, a fixed-side end plate, a fixed-side wrap standing upright on the fixed-side end plate, and a suction hole formed in a portion corresponding to an outermost portion of the fixed-side wrap, the suction hole being capable of communicating with the compression chamber, the suction passage includes an insertion pipe portion (65, 91) inserted into a through hole of the lid of the casing, and an in-plate passage (73, 92, 94) formed in the fixed-side end plate and having an outflow opening opened toward the suction hole, an insertion pipe portion (65, 91) inserted into a through hole of the lid of the casing, and an in-plate passage (73, 92, 94) formed in the fixed-side end plate and having an outflow opening opened toward the suction hole, a center of the through hole is closer to an axis of the barrel than a center of the outflow opening of the in-plate passage (73, 92, 94), the suction passage includes an introduction pipe, a main suction pipe, and a coupling pipe arranged sequentially from the upstream to downstream of a flow of a refrigerant, the main suction pipe extends linearly and vertically so as to be coaxial with the center of the through hole, the coupling pipe includes a first pipe portion and a second pipe portion, the protruding portion of the main suction pipe is connected to the first pipe portion, the first pipe portion is coaxial with the main suction pipe, the second pipe portion is further shifted radially outward than the first pipe portion with reference to the axis of the barrel of the casing, and the second pipe portion constitutes a downstream pipe portion which extends vertically to be coaxial with the center of the outflow opening.