| Event: | Men's 400 metres T12 |
| Games: | 2023 |
| Venue: | Mario Recordón Athletics Training Center |
| Dates: | November 22 |
| Competitors: | 3 |
| Nations: | 3 |
| Win Value: | 49.04 |
| Win Label: | Winning time |
| Gold: | Yamil Acosta |
| Goldnoc: | COL |
| Silver: | Marcos Vinícius de Oliveira |
| Silvernoc: | BRA |
| Bronze: | Richard González |
| Bronzenoc: | DOM |
| Prev: | 2019 |
| Next: | 2027 |
The men's T12 400 metres competition of the athletics events at the 2023 Parapan American Games was held on November 22 at the Mario Recordón Athletics Training Center within the Julio Martínez National Stadium of Santiago, Chile.[1] Due to the event having only three competitors, only the gold and silver medals were presented.
Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | 47.59 | Tokyo, Japan | September 2, 2021 | ||
| Parapan American Games record | 49.85 | Toronto, Canada | August 10, 2015 | ||
| Americas record | 47.93 | Tokyo, Japan | September 2, 2021 |
All times shown are in seconds.
| KEY: | bgcolor=ccffcc align=center | q | bgcolor=ccffcc align=center | Q | Qualified | PR | Parapan Games record | NR | National record | SB | Seasonal best | DQ | Disqualified |
The results were as follows:[2]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 3 | 49.04 | PR | ||||
| 5 | 51.10 | |||||
| 7 | Richard González (Guide: Fary Mejía) | 54.38 |