A scroll compressor comprising: a main body; a fixed scroll fixed inside the main body; an orbiting scroll orbiting the fixed scroll; a plurality of compressing portions (22, 100) respectively provided in the fixed scroll and the orbiting scroll, and a rotation shaft rotating with respect to a rotation axis and including an eccentric portion being eccentric from the rotation axis, wherein the eccentric portion is positioned alongside the compressing portion in a direction crossing the rotation axis, and wherein each compressing portion comprises a circular arc portion of which a curvature is constant, a curved portion positioned in an inside of the circular arc portion and spaced a preset distance from the circular arc portion, and a connection portion connecting the circular arc portion to the curved portion, wherein a curvature of the connection portion changes from the circular arc portion to the curved portion, characterized in that the connection portion is in a shape of one of a cosine curve, a Bezier curve, a Hermite curve, and a B-spline curve, and when the curved portion is in a shape of an arc of which a curvature is constant, the circular arc portion is referred to as a first circular arc portion, and the curved portion is referred to as a second circular arc portion, wherein, when a distance from a center of the compressing portion to the connection portion is R, a distance from the center of the compressing portion to the first circular arc portion is R 1, a distance from the center of the compressing portion to the second circular arc portion is R 2, a thickness of the first circular arc portion is t, a distance by which a center of the eccentric portion is eccentric from a center of the rotation shaft is ε, an angle of one end of the first circular arc portion with respect to a preset reference line is θ 1, an angle of one end of the second circular arc portion with respect to the preset reference line is θ 2, and an angle of a point of the connection portion with respect to the preset reference line is θ, R = R 1 − ε + t + ε + t cos φ, φ = − 180 α cos θ − θ 1, α = θ 1 − θ 2 is satisfied. a main body; a fixed scroll fixed inside the main body; an orbiting scroll orbiting the fixed scroll; a plurality of compressing portions (22, 100) respectively provided in the fixed scroll and the orbiting scroll, and a rotation shaft rotating with respect to a rotation axis and including an eccentric portion being eccentric from the rotation axis, wherein the eccentric portion is positioned alongside the compressing portion in a direction crossing the rotation axis, and wherein each compressing portion comprises a circular arc portion of which a curvature is constant, a curved portion positioned in an inside of the circular arc portion and spaced a preset distance from the circular arc portion, and a connection portion connecting the circular arc portion to the curved portion, wherein a curvature of the connection portion changes from the circular arc portion to the curved portion, characterized in that the connection portion is in a shape of one of a cosine curve, a Bezier curve, a Hermite curve, and a B-spline curve, and when the curved portion is in a shape of an arc of which a curvature is constant, the circular arc portion is referred to as a first circular arc portion, and the curved portion is referred to as a second circular arc portion, wherein, when a distance from a center of the compressing portion to the connection portion is R, a distance from the center of the compressing portion to the first circular arc portion is R 1, a distance from the center of the compressing portion to the second circular arc portion is R 2, a thickness of the first circular arc portion is t, a distance by which a center of the eccentric portion is eccentric from a center of the rotation shaft is ε, an angle of one end of the first circular arc portion with respect to a preset reference line is θ 1, an angle of one end of the second circular arc portion with respect to the preset reference line is θ 2, and an angle of a point of the connection portion with respect to the preset reference line is θ, R = R 1 − ε + t + ε + t cos φ, φ = − 180 α cos θ − θ 1, α = θ 1 − θ 2 is satisfied.