Powder separation device and solid fuel burner

A particle separator capable of enhancing the collection efficiency while minimizing an augmentation of auxiliary machinery power and an increase of the device size is provided. A particle separator (1A) that separates powder being transported on an air flow in a state of a solid-gas two-phase flow from the air flow and collects the powder is provided with a drift generating portion (10) provided in the vicinity of a main body connecting portion of a solid and gas supply tube (3) for letting the solid-gas two-phase flow stream inside a separator main body (2) from the circumferential direction and configured to concentrate a high powder particle concentration of the solid-gas two-phase flow on the outer peripheral side of the separator main body (2).