Hepatitis C is one of the most common social diseases in the world. The improvements in both the early diagnostics of the hepatitis C and the treatment of acute viremia caused by hepatitis C virus are undoubtedly an urgent task. In present work, we offered the micro‐ and nanotraps for the capturing of HCV. As a capturing moiety, we designed and synthesized in E. coli a fusion protein consisting of large extracellular loop of CD81 receptor and streptavidin as spacing part. The ob‐
tained protein has been immobilized on the surface of PLA‐based micro‐ and nanoparticles. The developed trapping systems were characterized in terms of their physico‐сhemical properties. In order to illustrate the ability of developed micro‐ and nanotraps to bind HCV, E2 core protein of HCV was synthesized as a fusion protein with GFP. Interaction of E2 protein and hepatitis C virus‐
mimicking particles with the developed trapping systems were testified by several methods.