Abstract: A new element is developed for cable structures with cables sliding on sheaves or pulleys. Based on the foundational principles of finite element analysis, the relation of the forces in the element at equilibrium state is used. The element, which is called sliding cable element, can model a finite length of cable supported somewhere along its length by a pulley or sheave. It simplifies computations by automatically adjusting the cable on each side of a pulley or sheave in order to maintain equilibrium. It can be incorporated into conventional finite element analysis schemes, to analyses the cable structures in service or during construction. This paper describes the algorithm of this new element which is verified in one engineering application example.