The invention discloses a medical history book which comprises a combination lock, a cover, writing pages, a lantern ring, a back cover, a thermometer, a magnetic card storage groove, a pen groove, a cover plate, a push groove, a laboratory sheet storage groove, a thermometer storage groove and a hinge. The combination lock is arranged at the left end of the back face of the outer surface of the cover. The thermometer is embedded in the left end of the inner surface of the cover. The magnetic card storage groove is formed in the right end of the inner surface of the cover. The pen groove is formed in the lower-right end of the inner surface of the cover. The back cover is connected to the cover through the lantern ring. The writing pages are connected to the outer surface of the lantern ring. The laboratory sheet storage groove is formed in the upper end of the inner surface of the back cover. The push groove is formed in the upper end of the outer surface of the laboratory sheet storage groove. The medical history book is provided with the combination lock, the phenomenon that medical information is dispersed due to the fact that irrelevant personnel open the medical history book can be avoided, the privacy safety of people is greatly ensured, people can know the indoor temperature conveniently through the thermometer, and auxiliary functions of the medical history book are achieved.