Context. The 26 Al short-lived radioactive nuclide is the source of the observed galactic diffuse γ-ray emission at 1.8 MeV. While different sources of 26 Al have been explored, such as AGB stars, massive stars winds, and supernovae, the contribution of very massive stars has never been studied. Aims. We study the stellar wind contribution of very massive stars, i.e stars with initial masses between 150 and 300 M , to the enrichment in 26 Al of the galactic interstellar medium. Methods. We discuss the production of 26 Al by studying rotating and non-rotating very massive stellar models with initial masses between 150 and 300 M for metallicities Z=0.006, 0.014, and 0.020. We confront this result to a simple Milky Way model taking into account both the metallicity and the star formation rate gradients. Results. We obtain that very massive stars in the Z=0.006-0.020 metallicity range might be very significant contributors to the 26 Al enrichment of the interstellar medium. Typically, the contribution of the winds of massive stars to the total quantity of 26 Al in the Galaxy increases by 150% when very massive stars are considered. Conclusions. Very massive stars, despite their rarity, might be important contributors to 26 Al and overall very important actors for nucleosynthesis in the Galaxy.