The present invention aims to provide a medicament and/or food having a cognitive function improving effect, and a method of improving the cognitive function. The present invention relates to a concomitant drug for improving cognitive function, which contains 1,2-dilinoleoyl-sn-glycero-3-phosphocholine and 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine, use of the concomitant drug for the improvement of learning and/or memory, a method for the improvement of cognitive function including administering the concomitant drug, and a method for the improvement of learning ability and/or memory ability including administering the concomitant drug.
