The complaints against Holah were for alleged breaches of Law 10.4 (d), tripping an opponent, and Law 10.4 (f) playing an opponent without the ball. Both offences were against Edinburgh's international full back Chris Paterson.
The Ospreys's star was found guilty on both counts with the offences being considered 'mid range'. The Panel handed Holah a ban for a period of two weeks after mitigating factors were taken into account and the player has 48 hours in which to lodge any appeal.
The Ospreys, the reigning Magners League champions, are due to travel to Thomond Park on Sunday for the first leg of two Pool matches - and a repeat of the 2008 quarter-final.