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In a swash plate type compressor having a shoe interposed between a swash plate and a concave surface of a piston, the concave surface has a first and a second spherical surface which are adjacent to and offset from each other to make a slight step extending along the concave surface. The shoe has a

In a swash plate type compressor having a shoe interposed between a swash plate and a concave surface of a piston, the concave surface has a first and a second spherical surface which are adjacent to and offset from each other to make a slight step extending along the concave surface. The shoe has a spherically convex surface received in the concave surface. In a condition where the spherically convex surface is received in the concave surface, the slight step serves to cause a small gap between the spherically convex surface and a part of the first spherical surface. When the swash plate is rotated together with a rotary shaft, the shoe converts a rotation of the swash plate into a reciprocating motion of the piston.

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1. A swash plate type compressor comprising:a rotary shaft; a swash plate rotatable together with said rotary shaft; a piston; and a shoe interposed between said swash plate and said piston for converting the rotation of said swash plate into a reciprocating motion of said piston, said shoe having a

1. A swash plate type compressor comprising:a rotary shaft; a swash plate rotatable together with said rotary shaft; a piston; and a shoe interposed between said swash plate and said piston for converting the rotation of said swash plate into a reciprocating motion of said piston, said shoe having a spherically convex surface, said piston having a concave surface for receiving said spherically convex surface, and said concave surface having a first and a second spherical surface which are adjacent to and offset from each other to make a slight step beginning substantially at a center portion of said concave surface and extending along said concave surface.