Najmiddin Kosimkhojiev (born 28 August 2004) is an Uzbekistani taekwondo practitioner. He won a gold medal at the 2025 World Taekwondo Championships.
Khudayberdiev competed at the 2024 Asian Taekwondo Championships and won a bronze medal in the 74 kg category.
In July 2025, he competed at the 2025 Summer World University Games and won a gold medal in the mixed team kyorugi event, making its debut as a medal event at the FISU World University Games. He also won a bronze medal in the 74 kg category. In October 2025, he competed at the 2025 World Taekwondo Championships and won a gold medal in the 74 kg category, defeating Edival Pontes in the finals.