The utility model aims at providing a looper device of a sewing machine. According to the lopper device, the lead-out direction and the lead-out positions of a lower looper thread are stabilized, an upper looper can reliably lift the lower looper thread of a lower looper of the sewing machine, the jumping is avoided and beautiful needle tracks are formed. The solution of the utility model is that a hole (101) of a looper tip thread outlet (100) of a pipe opening is obliquely formed towards a tip (P2) of the lower looper (8) in a way that threading of the looper thread is easily operated; when the needle tracks are formed, the lower looper thread (T3) extends to the cloth from a looper tip thread outlet in the lower looper thread lead-out direction (102) when the upper looper (7) lifts the lower looper thread of the lower looper, so that the looper tip thread outlet is superposed with a looper tip thread auxiliary outlet (103) penetrating in the lower looper thread lead-out direction.