The structure of bethanechol chloride C7H17ClN2O2 is solved from conventional X-ray powder diffraction data in direct space [monoclinic unit cell with a=8.8749(3) Å, b=16.4118(7) Å, c=7.1373(3) Å, β=93.803(1)°, V=1037.29(7) Å3, Z=4, and space group P21/n]. The existence of a second orthorhombic closely related form is discussed.