The invention relates to novel cocrystals of (R)-Baclofen and processes for preparation thereof, and in particular to cocrystals of (R)-Baclofen with cinnamic acid, benzoic acid, salicylic acid and ferulic acid. It also refers to pharmaceutical compositions containing said cocrystals and to a use of said cocrystals or pharmaceutical compositions for the treatment of a disease or disorder selected from spasticity due to multiple sclerosis, spinal cord injury or cerebral palsy, and alcoholism.