The present invention provides a cell mobilizing agent capable of efficiently and continuously accumulating cells involved in tissue repair. A cell mobilizing agent containing a lysophospholipid introduced with retinoic acid represented by the formula (1) and/or the formula (2) or a physiologically acceptable salt thereof as an active ingredient: wherein, R 1 and R 2 are each a retinoyl group or hydrogen and are not the same with each other.