Bioprinting has been a trending technology in recent years. It is a combination of engineering and biology. It can be used in the fields of tissue engineering and drug screening. It can be used to print 3D structures using 3D modeling software and to print with cultured cells. Bioink should have cells with the following characteristics: cell viability, cell differentiation, degradation, biocompatibility, and printability. Bioink contains biomaterials, living cells, and growth factors that are used to grow the cells. The replaced cells should possess chemical, physical, and mechanical properties. There are several methods to print biological organs, including microextrusion, inkjet bioprinting, and stereolithography.