In this study, economic structure and problems of trout enterprise were analysed in Fethiye district. It was aimed to determine the input of enterprises engaged in aquaculture at the Fethiye district, calculation of the economic situation, investigation of the market situation and determine problems. In addition possible solutions were tried to be to problems. In the district, it was interviewed with 17 trout enterprises. Data were collected with interviewing face to face by questionnaires. These data was analysed by MS Excel and SPSS programmes. 52.9% of the enterprises were established in the foothill, 35.3% were in open field and 11.8% were established in between valleys. 58.8% of these enterprises were individual enterprises, %17.6 was simple partnership and 23.5% were commercial partnership. The most shares in the active capital were constituted working capital with a rate of 70.3% whereas the share of landlord’s capital was 29.7%. The share of own capital in passive capital was 93.9% and the usage of foreign capital was low (6.1%). The share of variable cost was 83.6% while fixed cost was 16.4% in the total production cost. The main problem of enterprises was the rise of feed costs. A feed cost was found to constitute 63.4% of total production costs. Producers should be given support in terms of technical knowledge and efforts to raise awareness of local people and consumers should be made.