The 5 aryloxymethylene 2 (4 tolylxyacetylamido) 1,3,4 oxadiazoles were synthesized through the cyclization of 1 aryloxyacethl 4 (4 tolyloxyacetyl)thiosemicarbazides in refluxing mercury(Ⅱ)acetate.The structures of the products were characterized by IR, 1HNMR and elemental analysis.