A spinning reel for fishing includes a rotor, a fishing line guiding mechanism, and a bail reversing mechanism. The rotor has a cylindrical portion, and first and second rotor arms disposed in opposed positions on the cylindrical portion. The fishing line guiding mechanism has a line roller to guide a fishing line, a bail, first and second bail support members supporting first and second ends of the bail, the first bail support member coupled to the first rotor arm, and the second bail support member coupled to the second rotor arm. The bail reversing mechanism inverts the fishing line guiding mechanism to line casting or line winding positions. The line roller is disposed on the first bail support member and the bail reversing mechanism is disposed inside the second rotor arm. The first rotor arm includes two support legs extending forwardly from an outer peripheral portion of the cylindrical portion.