Debaratna Road (Thai: ถนนเทพรัตน, RTGS: Thanon Theppharat), officially known as Highway 34 Bang Na–Nong Mai Daeng Route (ทางหลวงแผ่นดินหมายเลข 34 สายบางนา–หนองไม้แดง), and still known colloquially —and officially in Bangkok— as Bang Na–Trat Road (ถนนบางนา–ตราด), is a highway in Thailand from Bangkok that heads to the east like Sukhumvit Road (Highway 3) and Motorway 7 (Bangkok−Ban Chang Motorway).

[1] In 1986, there was toll fee, with a toll station at the 41st kilometer (area of Bang Wua, Chachoengsao province), similar to Highway 32 (Asian Highway Route), but it was canceled according to a cabinet resolution in 1994.

On June 29, 2016, Princess Maha Chakri Sirindhorn officially gave it the name "Debaratna Road".

Then it passes through the area of Bang Pakong district, Chachoengsao province, then overlaps with Sukhumvit Road from the Khlong Om intersection up until the end at Nong Mai Daeng interchange in Mueang Chonburi, Chonburi province, with a total distance of 58.855 km (36.6 mi).

Bordering the road are the Nation Multimedia Group (NMG), Wat Sri Iam, Bangkok Mall, Central Bangna, Mega Bangna, Bangkok International Trade and Exhibition Centre (BITEC), Thainakarin Hospital, Bangna General Hospital 1, Nation University, Huachiew Chalermprakiet University (HCU), Ramkhamhaeng University (Bang Na Campus) etc.