PROBLEM TO BE SOLVED: To provide a roller for chassis dynamometer capable of simplifying a mounting/dismounting work of a roller cam to/from an attachment.SOLUTION: A roller 7 for chassis dynamometer includes: a roller body 1; an attachment 2; and a roller cam 3 as major components. The roller body 1 and the attachment 2 are fastened by a fastening bolt. The attachment 2 has a plurality of projections 22 each of which protrudes along a protruding direction perpendicular to a radial direction of the roller 7, and the roller cam 3 has a plurality of grooves G32 each of which engages with the projections when mounted on to the attachment 2.SELECTED DRAWING: Figure 2
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