A series of novel 3,5-dimethyl arylazo pyrazoles (3a-i) were synthesized by reacting various oxybutyrates with methyl paraben (1) in glacial acetic acid medium. The key intermediate oxybutyrates (2a-i) were prepared from substituted phenyl diazonium salts and acetyl acetone in alcohol medium. The structures of the synthesized compounds have been established on the basis of spectral data (IR, 1H-NMR, Mass). The antibacterial and antifungal activity of the compounds has also been evaluated. Few of them have shown significant antifungal activity when compared to standard Flucanazole.