The inhibitive action of Rose flower extract on corrosion of aluminium in hydrochloric acid solution was investigated through weight loss, temperature effect, kinetic study and open circuit potential (OCP) methods. As inhibitor concentration increases corrosion rate decreases while percentage of inhibition efficiency (I.E.) increases. As temperature increases corrosion rate increases while I.E. decreases. Mechanism of inhibition was also investigated by calculating the thermodynamic and activation parameters like (∆G), (Qads), (Ea), (∆Hads) and (∆Sads). It was found that the adsorption follows Langmuir adsorption isotherm. Maximum I.E. of Rose flower extract was found up to 95.60 % at 1.2 g/L inhibitor concentration in 0.75 M HCl solution. The inhibitive action of the extract is discussed in view of adsorption of rose flower molecule on the metal surface. The results obtained showed that the flower extract of Rose could serve as an effective green inhibitor for corrosion of aluminium in hydrochloric acid.