The women's 400 metres T37 event at the 2020 Summer Paralympics in Tokyo, took place on 31 August 2021.

The T37 category is for ambulant athletes with cerebral palsy.

These athletes have movement and coordination problems on one half of their body.

They have good ability in their dominant side of their body (ie hemiplegia).

Prior to the competition, the existing records were as follows:[1] The final took place on 31 August 2021, at 21:45:[2]