The crystal structures of the first two pyrazole N-substituted primary amides (3-methyl and 4-bromo) were determined. The amide groups from the R22 (8) hydrogen-bond dimeric pattern in all cases, in accordance with the higher rate found for the formation of this pattern in monosubstituted benzamides (81%) compared with the whole group of primary amide structures (34%). These two compounds and four other N-CONH2 pyrazoles were studied by solid state NMR (CPMAS technique).