The present invention provides a scroll compressor, which can reliably supply oil to two compression chambers of an external line side and an internal line side of a rotation scroll member, and improve the sealing performance of the compression chambers. The scroll compressor of the present invention comprises: a rotation scroll member of which a bottom board comprises a vertical arranged swirl-shaped scroll; compression chambers formed by the rotation scroll member and a fixed scroll member and provided with an internal line side compression chamber at the internal line side of the rotation scroll member and an external line side compression chamber at the external line side of the rotation scroll member; a back pressure chamber arranged at the back of the rotation scroll member; and a communicating pipeline for communicating the back pressure chamber and the compression chambers and for forming two openings respectively towards the internal line side compression chamber and the external line side compression chmaber of an opening portion of the compression chamber sides.