The fiber couse of the spinocerebellar tracts in the ventral and lateral funiculi of the cat spinla cord were studied by a new approach making cordotomies at different spinal levels or lesions of the restiform body followed by injectionas of HRP or WGA-HRP into the anterior cerbellar olbe. The retrogradely labeled axons showed characteristic distribution patterns ralated to the level and extent of the lesions. The results show the following. 1) The dorsal spinocerbellar tract (DSCT) originationg ipsilaterally form the thoracic and upper lumbar segments ascends in the dorsolateral fasciculus. It underoes a dorsal shift during its rostral coures. The tract is topially arranged and passes through the restiform body. 2) The ventral spinocerebellar tract (VSCT) arising contralaterally from lower thoractic, lumbar, and more eaudal segments passes via the ventral funiculus and ascends in the ventrolateral fasciculus. This tract is also topically arranged. It maks a lateral and then a dorsal region enetrs via the restiform body. 3) The spnocerebellar fibers oriinationg ipsilaterally from the cervical enlafrgement ascend in the lateralmost part of the lateral funiculus in the area between the dorsolateral and ventrolateral fasciculi, There fibers form two groups, one passing through the dorsolateral and ventrolateral fasciculi. These form two groups, one passing through the restiform body, the other through the superior cerbellar peduncle. 4) The spinocerebellar fibers origination comtralaterally form the central cervical nucaleus pass through the ventral funiculus and ascend in the lateralmost part of the lateral funiculus, mainly inthe ventrolateral fasciculus. Most of the fibers seem to pass through the superior cerebellar peduncle.