PURPOSE: To make a ruggedness generated on the side wall of a tyre unattractive and also restrain the bad outlook of the tyre generated on the adjacent place of ridges.

CONSTITUTION: A ring shape decoration body 1 consisting of ridges with 0.3-2mm height installed at 0.3-5mm interval in a periphery direction is provided on the surface of a side wall. The decolation body 1 is composed of a radial direction outside area A, an intermediate area B and a radial direction inside area C and is extended in a straight line shape in the intermediate area B and in a curved line shape in the radial direction outside area A and the radial direction inside area C and the center of the curvature radius of the curve in the radial direction outside area A is positioned in an opposite side of the center of the curvature radius in the radial direction inside area C by sandwiching the ridge in the intermediate area B.