Abstract: Method for the production of cannabinoid acid esters of general formula I or II or III or IV, wherein R1 consists of a straight or branched alkyl group, alkenyl group or alkynyl group having from 1 to 5 carbons, during the simultaneous extraction of cannabinoid acids derived from the plant Cannabis sp., preferably Cannabis sativa. The invention also refers to esters of cannabinoid acids with general formula I or II or III or IV obtained by this particular method, and pharmaceutical compositions containing said esters of cannabinoid acids for use in medical treatment.