Annually, the Golestan province accounts for about 70% of the country's soybean cultivation area. The soybean pod disfunction has been considered as one of the most important factors affecting soybean yield in Golestan province since 1985 and imposed more damages to farmers during the warm and dry summers. There are some evidence that there is a relationship between the soybean pod disorders and the thrips in there. For this reason, in a project called Sucking Pest Control on different dates of soybean planting to reduce the soybean pod disorders during 2016 and 2017, thrips at vegetative, flower and pod growth stages of infected soybeans were collected by shaking the last three leaves and the last node of flowers and the pods in wide mouth transparent plastic containers. In the laboratory, the thrips were transported to 70% alcohol and the microscopic slides were prepared. The results of this survey, points to the presence of Frankliniella occidentalis (Pergande) in soybean fields of Golestan province. Western Flower Thrips is one of the most important agricultural pests in the world. Polyphagy and a strong tendency to survive and feed on flowers and fruits is one of the most important features of its life cycle. In addition to direct damage, it is the most important vector of viruses, particularly Tomato spotted wilt virus (TSWV), which emphasizes its importance. This species entered the country in 2011 through the illegal entry of ornamental plants of Anthurium and African violet from Europe and propagation in a greenhouse of Sharifabad, Pakdasht, but its first official report from Iran dates back to 2003. Due to summer soybean cultivation in the province and its flowering in mid-summer, changing climate and rising temperature during the inoculation of soybean flowers, have provided the best conditions for the development of this pest. the emergence of this dangerous species in soybean fields of Golestan province, Given the availability of suitable temperature and nutrition conditions (pollen), can be a hazard to reduce soybean yield in the coming years and this should be considered in soybean integrated pest management strategies.