Pichaya Chaiwarangkun is a professional footballer from THA and is currently 18 years old. He is on the books of BG Pathum United and wears shirt number 19. At international level, he features for Thailand U17. His main role on the pitch is Forward. He measures 175cm in height and weighs 70kg. His stronger foot is Right.

His latest transfer saw him join BG Pathum United from BG Pathum United U18 via on 2025-08-01.

During the Thai League 1 2025-2026 campaign, Pichaya Chaiwarangkun made 2 appearances, scoring 0 goals and adding 0 assists. He averaged 0 goals per match from 0 shots, with 0 on target.