Patent ID: 8747089

Claim:
A fluid machine comprising: a seal target member which includes a first opening and a second opening and which has a cylinder shape, one direction of which is an axial direction; and an annular seal member which is arranged in a groove portion formed in an outer peripheral surface of the seal target member, and which forms a seal between the first opening and the second opening on the outer peripheral surface of the seal target member, wherein the first opening and the second opening are arranged to be displaced from each other in the axial direction and a circumferential direction of the seal target member, the annular seal member includes a first portion that is arranged side by side with the first opening at the second-opening side of the first opening in the axial direction, a second portion that is arranged side by side with the second opening at the first-opening side of the second opening in the axial direction, and a third portion that connects the first portion and the second portion, the first portion and the second portion are displaced from each other in the axial direction, and the third portion extends between the first opening and the second opening in a direction that is not parallel to the axial direction or the circumferential direction when the seal target member is viewed in a radial direction.