A pair of glasses has a glasses body and an adjusting structure. The glasses body has a lens frame and a nose pad. The nose pad is combined with the lens frame by two sliding slices and two tracks. The adjusting structure is mounted between the lens frame and the nose pad and has a first engaging block, a second engaging block, and a stopping block. The first engaging block and the second engaging block can be engaged with each other to keep the nose pad from separating from the lens frame. The stopping block is mounted to form a friction between the nose pad and the lens frame. The nose pad can be precisely adjusted and fine-tuned relative to the lens frame because of the sliding slices, the tracks, and the stopping block.