[en] A single crystal of uranium ternary intermetallic compound UPdGa₅ was grown by the Ga self-flux method. The magnetic susceptibility showed a weak temperature dependence and small anisotropy, consistent with an itinerant character of 5f electrons. We observed a clear drop in the susceptibility and electrical resistivity below the Neel temperature T_N=31 K. The magnetic structure was studied by means of a neutron diffraction measurement. We observed an antiferromagnetic peak with the propagation vector Q=[0, 0, 1/2]. The uranium 5f moment of 0.33(4)μ_B/U parallel to the c-axis was found to order ferromagnetically in the basal c-plane and coupled antiferromagnetically along the c-axis. (author)