Vibrational behavior of elastic homogeneous isotropic beams with general boundary conditions due to a moving harmonic force is analyzed. The analysis duly considers beams with four different boundary conditions; these include pinned–pinned, fixed–fixed, pinned–fixed, and fixed–free. The response of beams are obtained in closed forms and compared for three types of the force motion: accelerated, decelerated, and uniform motion. The effects of the moving speed and the frequency of the moving force on the dynamic behavior of beams are studied in detail.