The demonstration of a 69.8nm laser on 3p (3)P(2) - 3s (1)P(1) (J = 2 - 1) transition of Ne-like Ar pumped by capillary discharge is reported in this Letter. A main current of 12 kA with rise time of 43 ns was chosen to generate the plasma in a 35cm long capillary filling with pressure of Ar as low