Abstract: Plant oils are important supplies in world markets due to their widespread use in many branches of industry, cosmetics and nutrition. Control of their composition is a subject of major interest. In particular argan oil (from the kernels of Argania spinosa L.) has been claimed to have beneficial properties from therapeutical and cosmetic fields. Up to now there are no reports on the use of proton magnetic resonance (¹H-NMR) for analyzing the triacylglycerol composition of this oil. The percentage of saturated, monounsaturated, diunsaturated and triunsaturated acyl moieties is elucidated.