A scroll compressor comprising: a fixed scroll; and a movable scroll forming a compression chamber with the fixed scroll, the scroll compressor further comprising: a back pressure chamber allowing an intermediate pressure between a suction pressure and a discharge pressure of the compression chamber to act on a surface of the movable scroll opposite to a sliding surface of the movable scroll; an outer oil supply mechanism configured to supply oil to an outer chamber (S 1) of the compression chamber located radially outward of a wrap of the movable scroll; and an inner oil supply mechanism configured to supply oil to an inner chamber of the compression chamber located radially inward of the wrap of the movable scroll, wherein the inner oil supply mechanism includes an oil supply portion and a communication port, the oil supply portion being formed in a sliding surface of the fixed scroll to communicate with a suction region of the compression chamber, the communication port passing through the sliding surface of the movable scroll to communicate with the back pressure chamber, and the communication port communicates with the oil supply portion within a predetermined period in which a center position of a suction-side end of the wrap of the movable scroll in a thickness direction is located radially outward of a center position of a space between adjacent turns of a wrap of the fixed scroll, during one rotation of the movable scroll. a fixed scroll; and a movable scroll forming a compression chamber with the fixed scroll, the scroll compressor further comprising: a back pressure chamber allowing an intermediate pressure between a suction pressure and a discharge pressure of the compression chamber to act on a surface of the movable scroll opposite to a sliding surface of the movable scroll; an outer oil supply mechanism configured to supply oil to an outer chamber (S 1) of the compression chamber located radially outward of a wrap of the movable scroll; and an inner oil supply mechanism configured to supply oil to an inner chamber of the compression chamber located radially inward of the wrap of the movable scroll, wherein the inner oil supply mechanism includes an oil supply portion and a communication port, the oil supply portion being formed in a sliding surface of the fixed scroll to communicate with a suction region of the compression chamber, the communication port passing through the sliding surface of the movable scroll to communicate with the back pressure chamber, and the communication port communicates with the oil supply portion within a predetermined period in which a center position of a suction-side end of the wrap of the movable scroll in a thickness direction is located radially outward of a center position of a space between adjacent turns of a wrap of the fixed scroll, during one rotation of the movable scroll. a back pressure chamber allowing an intermediate pressure between a suction pressure and a discharge pressure of the compression chamber to act on a surface of the movable scroll opposite to a sliding surface of the movable scroll; an outer oil supply mechanism configured to supply oil to an outer chamber (S 1) of the compression chamber located radially outward of a wrap of the movable scroll; and an inner oil supply mechanism configured to supply oil to an inner chamber of the compression chamber located radially inward of the wrap of the movable scroll, wherein the inner oil supply mechanism includes an oil supply portion and a communication port, the oil supply portion being formed in a sliding surface of the fixed scroll to communicate with a suction region of the compression chamber, the communication port passing through the sliding surface of the movable scroll to communicate with the back pressure chamber, and the communication port communicates with the oil supply portion within a predetermined period in which a center position of a suction-side end of the wrap of the movable scroll in a thickness direction is located radially outward of a center position of a space between adjacent turns of a wrap of the fixed scroll, during one rotation of the movable scroll.