PROBLEM TO BE SOLVED: To provide an economical and stable liquid formulation by increasing the stability of a highly concentrated long-acting hGH conjugate.SOLUTION: The present invention relates to a liquid formulation of a highly concentrated long-acting human growth hormone (hGH) conjugate, comprising a pharmaceutically effective amount of the long-acting human growth hormone conjugate in which human growth hormone (hGH) is linked to an immunoglobulin Fc region, and an albumin-free stabilizer, the stabilizer comprising a buffer, a sugar alcohol, a non-ionic surfactant, and sodium chloride as an isotonic agent. The present invention relates to a method for preparing the liquid formulation.SELECTED DRAWING: Figure 1【課題】高濃度の持続型hGH結合体の安定性を向上させて、経済的で安定した液剤を提供すること。【解決手段】本発明は、ヒト成長ホルモン(Human Growth Hormone, hGH)と免疫グロブリンFc領域が結合された薬理学的有効量の持続型ヒト成長ホルモン(hGH)結合体と、アルブミン非含有安定化剤とを含み、前記安定化剤は、緩衝液、糖アルコール、非イオン性界面活性剤及び等張化剤としての塩化ナトリウムを含有する、持続型ヒト成長ホルモン結合体の高濃度液剤、並びに前記液剤の作製方法に関する。【選択図】図1