The Men's Volleyball Thailand League (Thai: วอลเลย์บอลชายไทยแลนด์ลีก) is the top-level professional men's volleyball league in Thailand. Contested by eight clubs, it operates on a system of promotion and relegation with the Volleyball Pro Challenge League. Seasons run from October to March, with teams playing 14 games each. Most games are played on Saturdays and Sundays, with a few games played on weekdays.
It is organized by the Thailand Volleyball Association (TVA). The league champion qualifies for the Asian Club Championship.
The league is recognized by the TVA, the FIVB, and the AVC. The league maintains strong ties with international volleyball governing bodies, adhering to the rules and regulations set by the FIVB and the AVC. The Women's Volleyball Thailand League is an FIVB-accredited club league, and its teams and players are registered with the FIVB. It is sponsored by Est Cola and therefore officially known as the EST Men's Volleyball Thailand League. In the Thailand League, the games are played during Saturdays and Sundays.