The present invention addresses the problem of providing a transfusion preparation wherein the formation of insoluble matter is inhibited after two liquids are mixed together during prolonged storage. Provided is a transfusion preparation which has two chambers separated by a communicable partition, wherein； a first chamber contains a first chamber transfusion containing a fat emulsion and at least one member selected from the group consisting of an amino acid having a buffering ability, a divalent organic acid and a trivalent organic acid； and a second chamber contains a second chamber transfusion containing an amino acid and at least calcium as an electrolyte.In this transfusion preparation: in the first chamber transfusion, the total content of the amino acid having a buffering ability, the divalent organic acid and the trivalent organic acid is 0.15-0.5 g/L； and,48 hours after the partition has allowed communication between the chambers, the pH value of the mixture of the first chamber transfusion with the second chamber transfusion is not higher than 6.53.
