The global demand for plastics is increasing due to it wide applications. About 60 to 80 percent of the waste of the marine environment belong to plastic class. There is a lack of information and research on the presence of plastic and micro-plastic contamination in aquatic animals, The present study, therefore examined the frequency, distribution, size, color and type of micro-plastic (MP_S) in the gastrointestinal tract of 5 species (n =10) from the coasts of the Chabahar Bay, the Oman Sea in spring, 96. The total number of MP_S found in the studied species varied and highest percentage of MP_S in the gastrointestinal tract of the fish belonged to fiber (55%), fragments (26%) and pellets (18%). The results of the Fourier transform infrared spectroscopy (FT-IR) analysis from suspect samples were shown the microplastic samples were found. The most commonly detected polymers were polyethylene (PE), polyethylene terephthalate (PET) and nylon. The results showed that all fish sampled from Chabahar Bay contained MP_S. Considering the importance of MP_S pollution, it can be suggested by studying this contamination By monitoring the release of plastics on the shores of tourism and fishing in the Chabahar of bay, as a subject of future studies.