A scroll compressor comprising: a fixed scroll ; a movable scroll that can revolve with respect to the fixed scroll; and a crankshaft that can rotate causing the movable scroll to revolve, wherein the fixed scroll and the movable scroll define a compression chamber for compressing a fluid, a discharge port for discharging the fluid from the compression chambers is formed in the fixed scroll, the movable scroll at least partially covers the discharge port and thereby can change a communication area (S) that is the area of a portion of the total area of the discharge port that contributes to communication with the compression chamber, as the crankshaft rotates from a first rotation angle position (θ1) that corresponds to a disposition in which the compression chamber and the discharge port start communicating with each other to a second rotation angle position (θ2) that is a preliminary discharge interval angle (Δθ) greater than the first rotation angle position (θ1), the communication area increases at a first rate of increase (G1), as the crankshaft rotates from the second rotation angle position to a third rotation angle position (θ3) that is greater than the second rotation angle position, the communication area increases at a second rate of increase (G2), and the second rate of increase (G2) is greater than the first rate of increase (G1), characterized in that the profile of the discharge port includes two sections that coincide with the profile of the movable scroll and an offset portion that does not coincide with the profile of the movable scroll, and the offset portion is sandwiched by the two sections. a fixed scroll ; a movable scroll that can revolve with respect to the fixed scroll; and a crankshaft that can rotate causing the movable scroll to revolve, wherein the fixed scroll and the movable scroll define a compression chamber for compressing a fluid, a discharge port for discharging the fluid from the compression chambers is formed in the fixed scroll, the movable scroll at least partially covers the discharge port and thereby can change a communication area (S) that is the area of a portion of the total area of the discharge port that contributes to communication with the compression chamber, as the crankshaft rotates from a first rotation angle position (θ1) that corresponds to a disposition in which the compression chamber and the discharge port start communicating with each other to a second rotation angle position (θ2) that is a preliminary discharge interval angle (Δθ) greater than the first rotation angle position (θ1), the communication area increases at a first rate of increase (G1), as the crankshaft rotates from the second rotation angle position to a third rotation angle position (θ3) that is greater than the second rotation angle position, the communication area increases at a second rate of increase (G2), and the second rate of increase (G2) is greater than the first rate of increase (G1), characterized in that the profile of the discharge port includes two sections that coincide with the profile of the movable scroll and an offset portion that does not coincide with the profile of the movable scroll, and two sections that coincide with the profile of the movable scroll and an offset portion that does not coincide with the profile of the movable scroll, and the offset portion is sandwiched by the two sections. <EOS>