In the title compound, C(18)H(17)NO, the dihydro-indene ring system is approximately planar, with a maximum deviation of 0.041 (2) Å. This ring system is almost coplanar with the benzene ring, making a dihedral angle of 5.22 (9)°. In the crystal, inter-molecular C-H⋯O hydrogen bonds link the mol-ecules into chains along the b axis.