Sliding components

Sliding components formed in an annular shape and disposed at a relatively rotating part of a rotating machine, one of an inner diameter side space and an outer diameter side space of the sliding components being a sealed fluid side space in which a sealed fluid exists, remaining one of the inner diameter side space and the outer diameter side space being a leakage side space into which the sealed fluid is prevented from leaking, wherein a sliding surface of one of the sliding components is provided with a plurality of communication grooves each having a start point communicating with the sealed fluid side space in a radial direction, an end point communicating with a storage groove, and a plurality of dynamic pressure generation grooves configured for generating a dynamic pressure at end points thereof upon a run of the rotating machine, wherein the dynamic pressure generation grooves are located on a side of the sealed fluid side space with respect to the storage groove in the radial direction, wherein the communication groove and the dynamic pressure generation groove adjacent to each other in a circumferential direction are isolated from each other by a land portion, wherein each of the dynamic pressure generation grooves extends from the sealed fluid side space toward a side of the storage groove and toward a downstream side of a flow of the sealed fluid on the sliding surface in a circumferential direction, and wherein the dynamic pressure generation grooves are larger in number than the communication grooves.