| Thuldai | |
| Native Name: | ठुल्दाई |
| Director: | Dayaram Dahal |
| Producer: | Drupada Bajagai Ram Krishna Bajgain |
| Story: | Sunita Bajgain |
| Starring: | Shiv Shrestha Jal Shah Niruta Singh Sunil Thapa Dayaram Dahal |
| Cinematography: | Sambhu Sapkota |
| Studio: | Jaya Chamunda Mai Films |
| Distributor: | Jaya Chamunda Mai Films |
| Runtime: | 138 min |
| Country: | Nepal |
| Language: | Nepali |
Thuldai (Nepali: ठुल्दै, translation: Big Brother) is a 1999 Nepali film directed by Dayaram Dahal and features music by Shambhujeet Baskota. The film has a cast that includes Jal Shah, Shiv Shrestha, Niruta Singh, and Sunil Thapa.