A garment for motorcyclists which includes a pair of trousers, a belt portion, at least one adjusting insert and at least one protective element which is removably applied to the knee portion of the garment. Said at least one protective element is removably housed in a pocket arranged in the garment. The garment is also provided at the bottom portion of said pair of trousers with fixing means suitable for defining a plurality of height positions with reference to the belt portion of the garment. Said at least one adjusting insert is suitable for being removably fixed to the fixing means in order to adjust the length of the trousers. The garment is also provided at its knee portion with fastening means suitable for defining a plurality of height positions with reference to the belt portion of the garment. Said fastening means are suitable for adjusting the configuration of the pocket in which the protective element is housed in order to adjust the positioning of said protective element.