Maihama Ōhashi Bridge, Road bridge between Edogawa-ku and Urayasu, Japan.

Maihama Ōhashi Bridge is a road bridge crossing the Kyū-Edo River and connecting Edogawa-ku in Tokyo with Urayasu in Chiba Prefecture. It has multiple traffic lanes for vehicles and dedicated pedestrian walkways, allowing safe passage for both commuters and visitors between the two areas.

The bridge was constructed to support Tokyo's expanding transportation network and address growing connectivity needs between the metropolitan area and surrounding regions. Today it carries the Bayshore Route and National Route 357, serving as a key link for regional traffic flow.

The name Maihama comes from the Urayasu district on the Chiba side, home to Tokyo Disney Resort. Traffic generated by the resort often congested the crossing, so in 2001 a dedicated Maihama entrance linking the resort area directly to the Bayshore Route toward Tokyo was added, funded by Oriental Land. The parallel Bayshore Road bridges carry sidewalks.

Three parallel bridges span the Kyū-Edo River here: the 1978 Bayshore Route in the centre, the 1984 eastbound Tokyo Bayshore Road upstream and the 1990 westbound carriageway downstream. Only the Bayshore Road bridges carry footpaths, so pedestrians cross on those decks. The westbound bridge is the road bridge nearest the river mouth, with the JR Keiyō Line truss bridge just beyond it.

The bridge is actually three parallel structures: the 1978 Bayshore Route span in the centre, a 1984 eastbound Tokyo Bay Road bridge upstream, and a 1990 westbound bridge downstream, the closest road bridge to the mouth of the Kyū-Edo River. The Maihama entrance, opened in 2001 at Oriental Land's expense, links the Disney Resort area directly to the Bayshore Route toward Tokyo.