Research on the early acquisition of sign language along with oral language by children with hearing impairment provides different findings regarding the effects of sign language. This study aimed to examine the effects of sign language on the verbal language skills of children with hearing impairment who acquired oral language as their mother tongue and learned Turkish Sign Language (TSL) as a second language at a later age, based on the experiences and opinions of their parents. The data obtained in the study, which is designed with phenomenology design, one of the qualitative research methods, were analyzed inductively. The findings show that the experts provided no information about TSL during and after diagnosis. The children’s first educational experiences were in institutions providing education with auditory-verbal methods. Participants stated that their children learned TSL through communication with their peers in different social contexts and that TSL positively affected both verbal language development and social development. Despite the participants’ concerns that early acquisition of TSL might negatively affect oral language, the findings suggest that learning TSL after the acquisition of oral language would be beneficial. As a result, parents find it more appropriate to acquire TSL after developing oral language due to existing educational programs, families’ lack of knowledge about TSL, and experts’ perspectives on sign language. In this direction, TSL education programs should be offered in early childhood, including family education, should be developed and families and experts should be informed about TSL.