In the title mol-ecule, C(8)H(10)N(5)O(2)S, the amino-(azido)-methyl and p-toluene-sulfonyl moieties are inclined almost at right angles with respect to each other, making a dihedral angle of 83.49 (6)°. An intra-molecular N-H⋯O hydrogen bond gives rise to the formation of six-membered ring with graph-set motif S(6). In the crystal, inter-molecular N-H⋯O hydrogen bonding is responsible for the formation of dimers about inversion centers, which are linked through another N-H⋯O inter-action along the b axis.