A compressor scroll comprising: a scroll flow path forming portion that forms a scroll flow path extending in a circumferential direction about an axis (O), having a spiral starting portion and a spiral ending portion intersecting and communicating with each other, and allowing a fluid to flow therein from a diffuser outlet formed on a first side of an axis (O) direction and in a radially inward direction about the axis (O); and an outlet flow path forming portion that forms an outlet flow path communicating with the spiral ending portion of the scroll flow path and extending in a tangential direction of a circle about the axis (O), wherein, in cross sections orthogonal to a flow direction of the spiral ending portion : the spiral starting portion and a plane extending from a wall surface on the first side of the diffuser in the axis (O) direction intersect each other; the wall surface on the first side of the diffuser in the axis (O) direction extends in the tangential direction with respect to an end portion of the spiral ending portion , which is the closest to the first side in the axis (O) direction; and a ridgeline which includes two recessed curved surfaces and a vertex is formed between the end portion and an intersection point (P5) where the spiral starting portion and the plane extending from a wall surface on the first side of the diffuser in the axis (O) direction intersect each other, and characterized in that the scroll flow path forming portion includes an expanded portion , which causes the scroll flow path to expand toward the spiral starting portion in the radial direction, at least in the spiral ending portion in a portion where the spiral starting portion and the spiral ending portion intersect each other. a scroll flow path forming portion that forms a scroll flow path extending in a circumferential direction about an axis (O), having a spiral starting portion and a spiral ending portion intersecting and communicating with each other, and allowing a fluid to flow therein from a diffuser outlet formed on a first side of an axis (O) direction and in a radially inward direction about the axis (O); and an outlet flow path forming portion that forms an outlet flow path communicating with the spiral ending portion of the scroll flow path and extending in a tangential direction of a circle about the axis (O), wherein, in cross sections orthogonal to a flow direction of the spiral ending portion : the spiral starting portion and a plane extending from a wall surface on the first side of the diffuser in the axis (O) direction intersect each other; the wall surface on the first side of the diffuser in the axis (O) direction extends in the tangential direction with respect to an end portion of the spiral ending portion , which is the closest to the first side in the axis (O) direction; and a ridgeline which includes two recessed curved surfaces and a vertex is formed between the end portion and an intersection point (P5) where the spiral starting portion and the plane extending from a wall surface on the first side of the diffuser in the axis (O) direction intersect each other, and characterized in that the scroll flow path forming portion includes an expanded portion , which causes the scroll flow path to expand toward the spiral starting portion in the radial direction, at least in the spiral ending portion in a portion where the spiral starting portion and the spiral ending portion intersect each other. <EOS>