In the present study, two phytopathogenic fungi were isolated from Phaseolus vulgaris L. Macroscopic and microscopic identification of the fungi attributed them to the genera Fusarium and Sclerotinia. Antifungal activities of three Pseudomonas strains; P7 Pseudomonas plantarii P30, P. fluorescens Biovar 5 and P36 P. fluorescens Biovar 5 revealed percent inhibition of the phytopthogenic fungi ranging from 47.78% to 100%. The determination of the antifungal mechanism of the strain P7 revealed a mycelium lysis of Sc-sc (Sclerotinia sclerotiorum) and deformation of Fop (Fusarium oxysporum f sp. phaseoli). The results lead us to think on the capability of utilization of the three strains as biocontrol agents against the phytopathogenic fungi.