| Wanasthana Sajakul | |
| Fullname: | Wanasthana Sajakul |
| Birth Date: | 9 February 1943 |
| Birth Place: | Narathiwat, Thailand |
| Manageryears1: | 1992–1994 |
| Manageryears2: | 1993–1995 |
| Manageryears3: | 1996 |
| Manageryears4: | 2006–2007 |
| Managerclubs2: | Thailand B (Dream Team) |
| Managerclubs4: | Chula-Sinthana FC |
| Ntupdate: | July 3, 2008 |
Wanasthana Sajakul, also known as Big Hoy (former name: Thawatchai Sajakul) is a Thai politician and former member of parliament, former manager for the Thailand national football team from 1993 to 1996, and manager of Thailand Premier League side Chula-Sinthana FC. He has led the side to the Thailand Division 1 League, Group B title in 2007 and the Thailand Division 2 League title in 2006.[1]
As manager
International
Club