An illumination structure for pliers contains: a first part, a second part, and an illumination device. The first part includes a first clamping jaw, a first handle, and a first rotatable connecting portion between the first clamping jaw and the first handle. The second part includes a second clamping jaw, a second handle, and a second rotatable connecting portion between the second clamping jaw and the second handle, wherein the first rotatable connecting portion of the first part and the second rotatable connecting portion of the second part are rotatably connected together. The first rotatable connecting portion has an accommodation groove configured to house the illumination device, and the accommodation groove has a first opening communicating with the first clamping jaw and the second clamping jaw and has a second opening communicating with the first handle. The illumination device includes a light emitting element and a control button.