Abstract: Theory of beam is very important in engineering field. According to shear effect, it can be divided into Euler beam, Timoshenko beam and high order shear beam. Most engineering problems can be analyzed by using Euler’s or Timoshenko’s beam theories according the slenderness ratio of the engineering component is large or small. In this investigation both Euler’s and Timoshenko’s beam theories have been used to analyze the clamp-clamp uniform slender beam acted on uniform distributed applied couple. Abaqus finite element software has been used to resolve one example to validate the theoretical results. As to this load and boundary condition, analysis of slender beam must take into the shear effect account.