This paper focuses on a "shared simulation" procedure for the modelling and analysis of an electropneumatic system. A "shared simulation" or "cosimulation" can be defined as the common simulation between specialized softwares, where parts of the model have been created. During procedure, information exchange is realized between simulation environments thanks to a communication interface. Such principle is explained and commented for a particular case: positioning control laws study of an electropneumatic cylinder, with "cosimulation" done between a fluid power simulation software (AMESim [1]) and the Matlab/Simulink software. Experimental and simulation results are compared, with possible parallel applications given. Advantages and drawbacks of "cosimulation" are discussed. Keyword: cosimulation, experimental and simulated results, electropneumatic.