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In the title organic salt of ibuprofen with trometamol, C4H12NO3+·C13H17O2−, the carboxylic acid group of ibuprofen has transferred its proton to the amino N atom of trometamol. In the crystal, the trometamol cations are linked via N—H...O hydrogen bonds, forming chains along [001]. To these chains are attached the ibuprofen anions via O—H...O and N—H...O hydrogen bonds. The chains are linked via further N—H...O and O—H...O hydrogen bonds, forming sheets parallel to (100). Two C atoms of the propanoate substituent in the ibuprofen anion are disordered over two sets of sites and were refined with a fixed occupancy ratio of 0.7:0.3.