Abstract. We present mean absolute proper motions of a globular cluster NGC 6121 (M4), determined by using the data from the UCAC2 Catalog. About 1500 stars brighter than 16.0 mag in J are measured in 30" X 30" area. The space velocity component U = 10 ± 5, V = 10 ± 5 and W = 10 ± 5 km s^-1 are determined using absolute proper motion.