| Mustafa Er | |
| Birth Date: | 11 January 1980 |
| Birth Place: | Bursa, Turkey |
| Height: | 1.80m |
| Position: | Midfielder |
| Youthyears1: | 1994–1999 |
| Youthclubs1: | Bursaspor |
| Years1: | 1999–2005 |
| Clubs1: | Bursaspor |
| Caps1: | 95 |
| Goals1: | 3 |
| Years2: | 2005–2009 |
| Clubs2: | Konyaspor |
| Caps2: | 113 |
| Goals2: | 0 |
| Years3: | 2009 |
| Caps3: | 0 |
| Goals3: | 0 |
| Years4: | 2010 |
| Clubs4: | Denizlispor |
| Caps4: | 2 |
| Goals4: | 0 |
| Years5: | 2010–2013 |
| Clubs5: | Bugsaşspor |
| Caps5: | 71 |
| Goals5: | 1 |
| Years6: | 2013–2014 |
| Clubs6: | Erdekspor |
| Caps6: | 10 |
| Goals6: | 4 |
| Nationalyears1: | 1997 |
| Nationalcaps1: | 5 |
| Nationalgoals1: | 1 |
| Nationalyears2: | 1997 |
| Nationalcaps2: | 5 |
| Nationalgoals2: | 0 |
| Manageryears1: | 2015–2017 |
| Managerclubs1: | Bursaspor (youth coach) |
| Manageryears2: | 2017–2018 |
| Managerclubs2: | Bursaspor (assistant manager) |
| Manageryears3: | 2018-2019 |
| Managerclubs3: | Bursaspor |
| Manageryears4: | 2019–2020 |
| Managerclubs4: | Kırşehir Belediyespor |
| Manageryears5: | 2020–2021 |
| Managerclubs5: | Bursaspor |
| Manageryears6: | 2022 |
| Managerclubs6: | Bursaspor |
| Manageryears7: | 2023 |
| Managerclubs7: | Ümraniyespor |
Mustafa Er (born 11 January 1980) is a Turkish football coach and former player.
A youth academy product of Bursaspor, Mustafa made his professional debut for Bursaspor in a 5-2 Süper Lig loss to Gaziantepspor on 20 March 1999.[1] Mustafa transferred to Konyaspor from Bursaspor, becoming a stalwart in the midfield for the team.[2]
After his retirement from football, Mustafa became a youth coach at Bursaspor, and worked his way up to assistant manager.[3] On 10 April 2018, Mustafa was appointed interim manager of Bursaspor after Paul Le Guen was sacked.[4]