Wat Bang Phli Yai Nai (Thai: วัดบางพลีใหญ่ใน, pronounced [wát bāːŋ pʰlīː jàj nāj]) is a Thai Buddhist temple in the area of Bang Phli Yai Subdistrict, Bang Phli District, Samut Prakan Province, outskirts Bangkok.

It was formerly known as Wat Phlapphla Chai Chana Songkhram (วัดพลับพลาชัยชนะสงคราม; literally "victory pavilion temple") as it was built to commemorate King Naresuan's victory over Burma army in this area.

According to folklore, it was first sighted floating in the Khlong Samrong canal by one of three brothers who were escaping the war with the Burmese during the Ayutthaya period.

In addition, Old Bang Phli Market (ตลาดโบราณบางพลี), a traditional marketplace and community lines along the Khlong Samrong next to the temple.

[1] Both temple and market are situated behind Big C Bang Phli, Thepharak Rd km 13.