Cyanide is often found as an environmental pollutant in the effluent of various industries such as: metal plating procedure, gold exploitation, photography and pesticide production. The consumption rate of different salts of cyanide in industries is estimated 2-3 million ton per year. Numerous procedures have been utilized in order to remove cyanide from industrial effluents. Among these methods, adsorption is considered one of the most common methods for decreasing and removal of cyanide from industrial effluents. Because of the biodegradability, low cost and abundance of agricultural wastes, the evaluation of the capacity of these materials in removing different pollutants from water and wastewater has been taken into consideration lately. In the recent study adsorbtion of cyanide through use of wheat bran treated by silver nitrate is investigated. The effects of different parameters on adsorption, as initial concentration (in range of 50 to 150 mg/L), dosage of adsorbent (in range of 1.2 to 2.4 g/L), contact time (in range of 2 to 270 minutes), agitation speed (in range of 120 to 200 round per minutes), and adsorbent particle size (in range of smaller than 150 to 600 micrometer) are studied. According to the results, optimum condition for cyanide adsorption through corresponding adsorbent for concentrations 50 and 80 mg/L, contact time is 270 minutes and for concentrations 120 and 150 mg/L is 120 minutes, agitation speed is 160 round per minutes and particle size is smaller than 150 micrometer. Capability of this adsorbent for elimination of cyanide in this condition is more than 99%. Adsorbtion isotherm is in accordance with BET model and maximum capacity of adsorbtion of cyanide through corresponding adsorbent in optimum condition, obtained in laboratory, is 52.37 mg cyanide per g adsorbent. Considering the results obtained from variance analyse, all the perameters in this study are meaningful. As the over all out come of the research we can announce that wheat bran treated by silver nitrate, used in this study, is able to eliminate cyanide from aqueous environment and can be replaced by common adsorbent like activated carbon, as a economic and capable adsorbent, in purification of wastewater poluted with cyanide. Keywords: Adsorption, cyanide, wheat waste, silver nitrite.