Abstract: A handlebar grip set has two turn signals, two operating kits, and two grips. Each of the two turn signals is detachable and has a base, an illumination module assembled to the base, and a housing assembled to the base and covering the illumination module. Each operating kit has a button module electrically connected to the illumination module of a corresponding one of the turn signals. Each one of the grips surrounds the base of a corresponding one of the turn signals. The base of each turn signal is configured to be assembled to one of two ends of a handlebar. The turn signals of the handlebar grip set provide sufficient warning function when a bicycle equipped with the handlebar grip set is turning.