To provide a new cell transplant measure in which a sufficient number of transplantation cells can certainly carry out take in a focus section, especially a myocardial infarction section for a long period of time.

A cardiac muscle trunk/precursor cell implantation measure includes the following processes. (1) The process of pouring the first solution of 0.1-0.3 percent by weight of self-polymerization nano peptide including the population of cardiac muscle trunk/precursor cells into the peripheral section of the myocardial infarction section, (2) the process of applying the second solution of 0.5-0.7 percent by weight of the self-polymerization nano peptide including the population of the cardiac muscle trunk/precursor cells to the surface of the myocardial infarction section, and (3) the process of making the solution applied to the surface of the myocardial infarction section gel. A kit for the cardiac muscle trunk/precursor cells implantation using the measure.