The present study was undertaken in Fatehabad district of Haryana. Total sample size was 35 respondent wholesaler, retailer, and processor including 20 farmers. To study Marketing channel and price spread, cost, margin, and marketing efficiency of mustard is main objectives of the study. The village are randomly selected from the selected block under area of cultivation of the crop. Convenient sampling was adopted for conducting the study. The averages price at different points in the marketing channel are compare to get gross margin. Gross margin are deducted from marketing cost incurred by different intermediaries to get the net margin at different level. Marketing efficiency of Channel-I is 2.76 percent, Which is most efficient because of there is no marketing intermediary involved in this channel and marketing cost is very low in this channel and there is no marketing margin as there is no involvement of marketing intermediary, followed by Channel-II, in which marketing efficiency is 2.62 percent. There are mainly four marketing channel in the region for the marketing of mustard. In which, "Producer Wholesaler Retailer Consumer" channel is highly dominant through which high percent of the mustard product are traded. But in this channel, marketing efficiency is low due to number of intermediaries and high marketing cost and margin.