1-(2,3-Dichloroanilinomalonyl) 3,5-dimethyl-4-unsubstituted/substituted phenyl azo) pyrazoles have been synthesised in 30 to 60% yield, by the reaction of 2,4-diketo-3 (unsubstituted/substituted phenylazo) pentanes with (2,3-dichloroanilido) acetohydrazide. Pyrazoles are white and pale yellow colour solids, having high melting points. Identity of products has been established by elemental analysis and spectral data. Antibacterial and antifungal activities of new arylazopyrazoles have been tested.