Nadhiyai Thedi Vandha Kadal () is a 1980 Indian Tamil-language film. The directorial debut of B. Lenin, the film stars Jayalalithaa and Sarath Babu. It was the last Tamil film to be released with Jayalalithaa in the lead role, and is based on the novel of the same name by Maharishi. The film was released on 15 January 1980.
The music was composed by Ilaiyaraaja. Lyrics written by Panchu Arunachalam. The song "Poonthottam Poovil" attained popularity, and was frequently broadcast on radio stations in Madras.
Nadhiyai Thedi Vandha Kadal was released on 15 January 1980. Kausikan of Kalki thanked director Lenin for carrying the story smoothly and concluded fans flock to the theatre like sea. Maharishi, however, was dissatisfied with the ending and few changes of the film made from the novel.