Full range of fluorsubstituted benzaldoximes were synthesized by reaction of the fluorine-substituted benzaldehydes with hydroxylamine sulphate in the presence of sodium acetate in methanol. Trifluoromethyl- and 4-methoxy-fluorosubstituted benzaldoximes were synthesized also. Antimycobacterial properties of the synthesized compound were studied with the non- pathogenic strain Mycobacterium terrae 15755. The antimycobacterial activity of these substances is comparable to currently used anti-TB agents (pyrazinamide and isoniazide) with MIC ≥200 μg/mL.