| Chatchai Saengdao | |
| Fullname: | Chatchai Saengdao |
| Birth Date: | 11 January 1997 |
| Birth Place: | Bangkok, Thailand |
| Currentclub: | Muangthong United |
| Clubnumber: | 3 |
| Position: | Centre back |
| Youthyears1: | 2013–2015 |
| Youthclubs1: | Assumption College Thonburi |
| Years1: | 2016– |
| Caps1: | 48 |
| Goals1: | 0 |
| Years2: | 2016 |
| Clubs2: | → Pattaya United (loan) |
| Caps2: | 4 |
| Goals2: | 0 |
| Years3: | 2017 |
| Clubs3: | → Bangkok (loan) |
| Caps3: | 10 |
| Goals3: | 0 |
| Years4: | 2018 |
| Clubs4: | → Udon Thani (loan) |
| Caps4: | 6 |
| Goals4: | 0 |
| Years5: | 2024 |
| Clubs5: | → PT Prachuap (loan) |
| Caps5: | 7 |
| Goals5: | 1 |
| Nationalyears1: | 2017–2018 |
| Nationalteam1: | Thailand U21 |
| Nationalcaps1: | 7 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2018–2020 |
| Nationalteam2: | Thailand U23 |
| Nationalcaps2: | 12 |
| Nationalgoals2: | 0 |
Chatchai Saengdao (Thai: ชาติชาย แสงดาว,[1] born 11 January 1997) is a Thai professional footballer who plays as a centre back for Thai League 1 club Muangthong United.[2]