In the title compound, C(18)H(14)BrNO, the naphthalene ring system and the benzene ring form dihedral angles of 78.8 (2) and 19.7 (2)°, respectively, with the acetamide C-C(=O)-N plane. The naphthalene ring system forms a dihedral angle of 64.88 (19)° with the benzene ring. In the crystal, mol-ecules are linked via inter-molecular bifurcated (N,C)-H⋯O hydrogen bonds, generating an R(2) (1)(6) ring motif, forming chains along the b axis.