To provide a rough road tester for reproducing an uneven state of various road surfaces without restricting the circumferential length of a roller on which a tire is arranged.

At least one roller (for example, two rollers, a drive roller 5a and a drive roller 6a), of rollers (for example, all drive rollers 5a, 6a, 7a, 8a and driven rollers 5b, 6b, 7b, 8b) having uneven parts 18 and uneven parts 28, has an outer peripheral surface, uneven parts 18, 18 formed of projecting members 29 inserted into insertion holes 21b formed in the outer peripheral surface, and displacing mechanisms 19, 19 for reciprocating and displacing the projecting members 29 inserted into the insertion holes 21b in a state where each of the rollers 5a, 6a rotates in the axial direction of the insertion holes 21b.