Abstract: A convertible dining/billiard table includes features allowing a slim design dining table at regular dining height, easily convertible in a pool table. One feature is a pocket ball holder for a pool, snooker, pyramid or other pocket billiard table, featuring a very flat design with no depth when the pocket ball holder does not hold any ball, but able to stretch and hold several balls when one or several balls are pocketed. The ball holder includes an elastic membrane. The table is also provided with a height adjustment mechanism, including two profiles, a first one of the profile being slidably disposed inside a second one of the profile. A third piece is provided consisting in a cylindrical bar moving through specifically shaped cavities in the two profiles and engaging in a first position when moving one profile in one direction.