One of the symptoms associated with autism is sensations. Seven male patients with age range 15-38 and diag-nosed as autism according to DSM-IV have been presented in this case series. All of the cases presented with smelling of the all objects. It is considered that in addition to the autistic symptoms, smelling behavior show that they have primitive origin. We thought that the triad of obsessive compulsive disorder, autism and smelling the objects might be a subgroup of autistic spectrum disorders. [Anadolu Psikiyatri Derg 2011; 12(4.000): 301-303]