Conventional plastics are used in the last years/decades. However, these materials have environmental problems. After its utilization, they are not biodegradable and generate an increase of greenhouse gases. Thus, it is important to replace the traditional plastics by a new material: bioplastics. Bioplastics are biodegradable, and some of them are biocompatible. Starch, cellulose, polyhydroxyalkanoates, poly(lactic acid), and cellulose are bioplastics, which can be used in agriculture, medicine, packaging, structural, and automotive engineering. Bioplastics are produced from polysaccharide, protein, and other glyceride resources. Starch is a thermoplastic, and it can be used for different applications. Also, cellulose and polyhydroxyalkanoates have different applications.