A fluid is actively taken into sealing faces and discharged from the sealing faces so as to prevent concentration of sediment causative substances on the sealing faces and hence prevent generation of sediment while preventing leakage of the fluid taken into the sealing faces to a low pressure fluid side. A fluid circulation groove 10 including an inlet section 10a where a fluid comes in from a high pressure fluid side, an outlet section 10b where the fluid goes out to the high pressure fluid side, and a communication section 10c that provides communication between the inlet section 10a and the outlet section 10b is provided in one of sealing faces of a pair of sliding parts that slide on each other. The fluid circulation groove 10 is isolated from a low pressure fluid side by a land section R. At least a sectional area of the groove in the inlet section 10a or the outlet section 10b is set to be different from a sectional area of the groove in the communication section 10c in such a manner that pressure of the fluid flowing through the fluid circulation groove 10 is lowered in the communication section 10c.