[en] Hydrogen absorption-desorption properties of the UZr_0.29 alloy and uranium metal were investigated in detail at hydrogen pressures as high as to 0.4 MPa and over the temperature range of 300-723 K. Both UZr_0.29 alloy and uranium metal showed similar hydrogen isotopic effect and hysteresis effect. UZr_0.29 alloy absorbed hydrogen (deuterium) up to 2.3H (2.18D) atoms per F.U. (formula unit) by only one-step reaction and hence each desorption isotherm had a single plateau over nearly the whole hydrogen composition range. The UZr_0.29 alloy showed a little lower dissociation pressure than that of pure uranium; however, it exhibited high durability against powdering upon hydrogenation and may have good heat conductivity. The UZr_0.29 hydride has the potentiality to substitute pure uranium hydride as a material for tritium treatment and storage