By the method of helium thermal desorption from submicrocrystalline palladium presaturated in the gaseous phase, the diffusion coefficient Dff and solubility coefficient Ceff of helium are measured in the range P = 0-3 MPa and T = 293-508 K. The pressure dependence of Ceff flattens at high pressures. At low saturation pressures, the temperature dependences of the diffusion and solubility coefficients may be divided into (1) high-temperature (400-508 K) and (2) low-temperature (293-400 K) ranges described by the exponentials D1, 2 = D0exp(-E1,2D/kT) and C1, 2 = C0exp(-E1,2S/kT). The energies of diffusion activation are E2D = 0.0036 ± 0.0015 eV and E1D = 0.33 ± 0.03 eV, and the solution energies are E2S = -0.025 ± 0.008 eV and E1S = 0.086 ± 0.008 eV in the low- and high-temperature ranges, respectively. Mechanisms behind the diffusion and solution of helium are discussed. © 2002 MAIK "Nauka/Interperiodica".