A sliding member includes a base layer that includes soft particles made of a soft material deposited in a matrix and a soft layer made of a soft material. The soft material is softer than the matrix, the soft layer is formed on a surface of the base layer, and an average epitaxial index of the soft particles at the boundary portion of the sliding member is equal to or greater than 70% and less than or equal to 100%. The epitaxial index of a soft particle at the boundary portion is a ratio of: a portion of a length between a first endpoint and a second endpoint of a soft particle where an edge of the boundary portion is not visible within an area less than 1 m from the length between the first endpoint and the second endpoint, to the length between the first endpoint and the second endpoint.

A sliding member includes a base layer that includes soft particles made of a soft material deposited in a matrix and a soft layer made of a soft material. The soft material is softer than the matrix, the soft layer is formed on a surface of the base layer, and a maximum epitaxial index of the soft particles as the boundary portion of the sliding member is equal to or less than 10% and greater than 0%. The epitaxial index of a soft particle at the boundary portion is a ratio of: a portion of a length between a first endpoint and a second endpoint of a soft particle where an edge of the boundary portion is not visible within an area less than 1 m from the length between the first endpoint and the second endpoint, to the length between the first endpoint and the second endpoint.

A sliding member includes a bearing alloy layer and an overlay. The overlay includes a diffusion prevention layer on the bearing alloy layer, and a corrosion prevention layer on the diffusion prevention layer. A surface of the corrosion prevention layer is a sliding surface. The corrosion prevention layer constitutes 50% to 90% of an entire volume of the overlay. The corrosion prevention layer and the diffusion prevention layer each include a corrosion inhibitor and the balance of Bi and inevitable impurities. The corrosion inhibitor is defined as one or more elements that have a higher oxygen affinity than Bi and that form an alloy, a solid solution or an intermetallic compound with Bi. An average concentration of the corrosion inhibitor included in the diffusion prevention layer is lower than an average concentration of the corrosion inhibitor included in the corrosion prevention layer.