PROBLEM TO BE SOLVED: To provide a method for measuring an infrared absorption spectrum of skin accurately, regardless of a degree of adhesion between the skin and a sample contact part of a device for measuring an infrared absorption spectrum.SOLUTION: A method for measuring an infrared absorption spectrum includes the steps of: applying an infrared ray to a skin surface of a human from an infrared ray irradiation unit via a sample contact part detecting an infrared ray which is reflected from the skin surface of the human and is transmitted through the sample contact part and performing correction at operation means which corrects, regarding the infrared ray detected, an amount of contribution to infrared absorption by skin at a contact portion where the skin surface comes into contact with the sample contact part, and an amount of contribution to infrared absorption by skin at a noncontact portion where the skin surface is out of contact with the sample contact part.COPYRIGHT: (C)2012,JPO&INPIT【課題】皮膚と赤外吸収スペクトル測定装置の試料接触部との密着度によらず、皮膚の赤外吸収スペクトルを正確に測定する方法を提供する。【解決手段】ヒトの皮膚表面に赤外光照射部から試料接触部を介して赤外光を照射する工程、ヒトの皮膚表面を反射し、前記試料接触部を透過した赤外光を検出する工程、及び検出した赤外光における、皮膚表面と試料接触部とが接触する接触部の皮膚による赤外吸収の寄与分と、皮膚表面と試料接触部とが接触しない非接触部の皮膚による赤外吸収の寄与分とを補正する演算手段により補正処理をする工程を含む、赤外吸収スペクトルの測定方法。【選択図】図1