An impeller for a centrifugal rotary machine, comprising: a disc formed in a discoid shape about an axis; a plurality of blades including a leading edge into which a fluid flows and a trailing edge out of which the fluid flows and arranged at intervals in a circumferential direction on a face facing a direction of the axis; wherein each of the blades, includes: a first portion, a second portion, a third portion and a fourth portion in order from the leading edge toward the trailing edge; a first section disposed in the second portion, rising from the disc and inclined toward an opposite direction of a rotary direction, and a second section continuing from the first section and inclined toward a forward direction of the rotary direction; and a fifth section disposed in the third portion, rising from the disc and inclined toward the opposite direction of the rotary direction, and a sixth section continuing from the fifth section and inclined toward the opposite direction of the rotary direction; characterized in that each of the blades further includes: a seventh section disposed in the fourth portion, rising from the disc and inclined toward the forward direction of the rotary direction, and an eighth section continuing from the seventh section and inclined toward the forward direction of the rotary direction. a disc formed in a discoid shape about an axis; a plurality of blades including a leading edge into which a fluid flows and a trailing edge out of which the fluid flows and arranged at intervals in a circumferential direction on a face facing a direction of the axis; wherein each of the blades, includes: a first portion, a second portion, a third portion and a fourth portion in order from the leading edge toward the trailing edge; a first section disposed in the second portion, rising from the disc and inclined toward an opposite direction of a rotary direction, and a second section continuing from the first section and inclined toward a forward direction of the rotary direction; and a fifth section disposed in the third portion, rising from the disc and inclined toward the opposite direction of the rotary direction, and a sixth section continuing from the fifth section and inclined toward the opposite direction of the rotary direction; characterized in that a first portion, a second portion, a third portion and a fourth portion in order from the leading edge toward the trailing edge; a first section disposed in the second portion, rising from the disc and inclined toward an opposite direction of a rotary direction, and a second section continuing from the first section and inclined toward a forward direction of the rotary direction; and a fifth section disposed in the third portion, rising from the disc and inclined toward the opposite direction of the rotary direction, and a sixth section continuing from the fifth section and inclined toward the opposite direction of the rotary direction; characterized in that each of the blades further includes: a seventh section disposed in the fourth portion, rising from the disc and inclined toward the forward direction of the rotary direction, and an eighth section continuing from the seventh section and inclined toward the forward direction of the rotary direction. a seventh section disposed in the fourth portion, rising from the disc and inclined toward the forward direction of the rotary direction, and an eighth section continuing from the seventh section and inclined toward the forward direction of the rotary direction.