Bean pericarp (Pericarpium phaseoli) is a pharmacopoeic plant material which exerts diuretic and antidiabetic activities, described in the Polish Pharmacopoeia VI. The presence of free aminoacid and arginine identified with TLC method, is one of the requirements the bean pericarp must fulfil to be classified as a pharmacopoeic plant material. The aim of this work was to describe the method which enables the identification of free peptic aminoacids occurring in the bean pericarp with the HPLC method and the Dabsyl chloride. The HPLC analysis of the extracts abtawved faom the. ^túca^ oí exatwcveà an à their cultivars avowed to identify the presence of a large number of free aminoacids. K hi%h coutewt oí ojstevc\e, Veudwe, \so\e\icme and avgmme was observed in the methanol extracts obtained from the bean pericarp. The highest content of free aminoacids was found in the bean pericarp of the Piękny Jaś cultivar, the lowest content was found in the Blanka cultivar.