Single crystals of PuGa3 have been prepared by the gallium flux method. X-ray diffraction as well as magnetization measurements show that the hexagonal phase was selectively grown among two allotropes of trigonal and hexagonal ones. Magnetization shows highly anisotropic behavior with a magnetic easy axis along the c-direction. The present behavior is discussed in comparison with other actinide-gallium systems. © 2012 The Physical Society of Japan.