A nonlinear optical material, 1-benzoyl-3-(4-benzyl)thiourea (C15H14N2OS), has been characterized by X-ray powder diffraction. Experimental values of 2θ corrected for systematic errors, relative peak intensities, values of d, and the Miller indices of 82 observed reflections with 2θ up to 80° are reported. The powder diffraction data have been evaluated, and the figures-of-merit are reported. The least-squares refined unit cell parameters are a=22.0243(6)Å, b=10.9795(7)Å, c=13.0322(8)Å, β=116.88(2)°, V=2810.8(9)Å3, Z=8, Dx=1.278 g/cm3, space group Pn.