| Birth Date: | 11 January 1993 |
| Birth Place: | Tübingen, Germany |
| Position: | Midfielder |
| Currentclub: | SSV Reutlingen 05 |
| Clubnumber: | 8 |
| Youthclubs1: | TB Kirchentellinsfurt |
| Youthclubs2: | SV Rommelsbach |
| Youthyears3: | –2008 |
| Youthclubs3: | SSV Reutlingen 05 |
| Youthyears4: | 2008–2010 |
| Youthclubs4: | VfB Stuttgart |
| Youthyears5: | 2010–2011 |
| Youthclubs5: | SSV Reutlingen 05 |
| Youthyears6: | 2011–2012 |
| Youthclubs6: | Stuttgarter Kickers |
| Years1: | 2012–2014 |
| Clubs1: | Stuttgarter Kickers II |
| Caps1: | 61 |
| Goals1: | 3 |
| Years2: | 2014–2016 |
| Clubs2: | Stuttgarter Kickers |
| Caps2: | 16 |
| Goals2: | 0 |
| Years3: | 2016 |
| Clubs3: | → FC 08 Homburg (loan) |
| Caps3: | 12 |
| Goals3: | 1 |
| Years4: | 2016–2019 |
| Clubs4: | FC 08 Homburg |
| Caps4: | 75 |
| Goals4: | 4 |
| Years5: | 2019–2022 |
| Clubs5: | TSG Balingen |
| Caps5: | 40 |
| Goals5: | 2 |
| Years6: | 2022– |
| Clubs6: | SSV Reutlingen 05 |
| Caps6: | 3 |
| Goals6: | 0 |
| Club-Update: | 18 November 2022 |
Marco Gaiser (born January 11, 1993) is a German footballer who plays for SSV Reutlingen 05 in the Oberliga Baden-Württemberg.