Based　on　pseudo-rigid-body　model　(PRBM),　a　new　model　is　proposed　considering　the　effect　of　axial　deflection　of　flexural　beam　in　compliant　mechanisms.　The　axial　and　lateral　deflections　of　flexural　beam　are　modeled　using　three　rigid　links　joined　by　one　prismatic　(P)　pair　with　a　linear　spring　and　one　revolute　(R)　pair　with　a　torsion　spring,　respectively.　The　flexural　beam　subjected　to　an　end　force　load　is　simulated　by　the　PR　PRBM　with　two　degree-of-freedom.　The　optimal　characteristic　parameters　of　the　PR　PRBM　are　determined.　The　advantage　of　the　new　model　is　illustrated　compared　with　the　1R　(one　revolute　pair)　and　2R　(two　revolute　pairs)　PRBM.