To provide a thermochromic suitable temperature displaying package body for storing a thermochromic article and displaying whether temperature during the distribution or storage of the thermochromic article is included within a predetermined temperature or not.

A package body storing a thermochromic article required to be stored in a predetermined temperature or less has a reversible thermochromic layer including a thermochromic color-memory material, and the thermochromic article and the thermochromic color-memory material in the package body show hysteresis characteristics about a color density-temperature curve and show chromatic-achromatic interchangeability. When the temperature reaches a discoloration start temperature t3 in a temperature rise process from a chromatic state, discoloration is started, and in a temperature region of a complete discoloration temperature t4 and more, the thermochromic article is completely turned to an achromatic state. When the temperature reaches a color development start temperature t2 in a temperature drop process, the thermochromic article starts to color, and in a temperature region of a complete color development temperature t1 or less, the thermochromic article shows the hysteresis characteristics of complete coloring. The thermochromic suitable temperature displaying package body is configured so that the complete discoloration temperature (A') of the package body to the complete discoloration temperature (A) of the thermochromic article satisfies the following expression (1): A-5≤A'≤A.