Snake is one of the rare animals to be represented actually by over 2500 species on earth. Widespread geographical distributions as well as a long historical issue make that they possess a relatively adaptive anatomy. This paper deals with snake-like locomotion that is distinguished from wheeled and legged ones by fundamental physical differences. Research on snake-like locomotion is motivated by several applications from inspection in hazardous environment to use as medical apparatus to operate inside human body. A proposal of a biologically motivated alternative locomotion for mobile robots is aimed within the project.