[en] Superconductivity in single crystalline Mo₃P has been investigated by the measurement of electrical resistivity, magnetic susceptibility, and specific heat capacity. Its space group is I 4-2 m with lattice parameters a = b = 9.808 4 Å and c = 4.838 2 Å. A bulk superconductivity with a critical temperature of T _C = 5.6 ± 0.1 K, an upper critical field of ${\mathrm{\mu <!--\; ??\; -->}}_0{H}_{C2}$ = 13.7 ± 0.1 kOe, and a lower critical field of ${\mathrm{\mu <!--\; ??\; -->}}_0{H}_{C1}$ = 190 ± 2 Oe for ρ _ab were confirmed. A large anisotropic behavior was discovered in the resistivity and upper critical fields. A clear upward curvature in H _c2 was observed, suggesting a multiband superconductivity in Mo₃P. The value of the Ginzburg–Landau parameter κ _GL indicates that Mo₃P is a type-II superconductor. ΔC(T _c)/γ T _c = 1.50 and 2Δ/k _B T _c = 3.48 from the specific heat analyses indicate that Mo₃P is a weak-coupling Bardeen–Cooper–Schrieffer superconductor with fully gapped superconductivity. (paper)