Single crystals of L-Arginine Benzohydrazide (LABH) were grown by slow evaporation technique. Single crystal X-ray diffraction analysis reveals that the crystal belongs to orthorhombic crystal system with a=8.7740Å, b=10.4434Å and c=13.0843Å. Fourier Transform Infra-red analysis was carried out for the confirmation of functional group present in the grown crystal. The optical transmission study reveals the transparency of the crystal in the entire visible region and the cut off wavelength has been found to be 300 nm. Mechanical strength of the grown crystal was analyzed using Vickers microhardness tester and confirms that the grown crystal is a soft material. Nonlinear optical property of the crystal was confirmed by Kurtz Perry powder technique and it found that SHG efficiency is 1.9 times that of KDP.