Abstract: A sliding apparatus for a roller skate shoe includes a roller seat fixed to a rear section of a sole of a shoe body. The roller seat is formed with an accommodating slot, which is combined with a roller assembly through assembling elements. The roller assembly includes a pivoting frame having a center formed with a long slot. Each of two sides of the long slot is formed with a shaft hole seat for supporting and positioning a rotating shaft. The rotating shaft passes through several rollers that may be rotated freely to move the roller skate shoe. Thus, the roller assembly can be replaced with a new one so that the lifetime of the roller skate shoe is lengthened and the environment protection effect can be achieved.