Drensko Rebro () is a settlement in the Municipality of Kozje in eastern Slovenia. It lies in the hills northeast of LesiÃÂno. The area is part of the historical Styria region. The municipality is now included in the Savinja Statistical Region.
Drensko Rebro is the site of two known mass graves from the end of the Second World War. They both contain the remains of Croatians that were disarmed and murdered in May 1945 along the road to Virà ¡tanj and at the crossroads between Drensko Rebro and LesiÃÂno. The House No. 8a Mass Grave () is located north of Pilà ¡tanj, between a roadside ditch and a slope. The Suà ¡ica Creek Mass Grave () is located in a meadow between Suà ¡ica Creek and the road to Pilà ¡tanj, between electric poles numbered 41 and 42.