PROBLEM TO BE SOLVED: To provide an information processor capable of logically supporting a prescription for a Chinese medicine.SOLUTION: The information processor includes: a storage part 2 for storing correspondence information showing a correspondence relation between a symptom and a Chinese medicine means 3 for acquiring a specific symptom means 4 for calculating a prior probability of the specific symptom and prior probabilities of symptoms other than the specific symptom on the basis of the correspondence information means 5 for calculating a conditional probability that respective Chinese medicines constituting a Chinese medicine group are prescribed when the specific symptom is originated and a conditional probability that respective Chinese medicines constituting a Chinese medicine group are prescribed when a symptom other than the specific symptom is originated on the basis of the correspondence information in each Chinese medicine group comprising any combination of a plurality of Chinese medicines means 6 for calculating a posterior probability on the basis of the prior probability and the conditional probability of each Chinese medicine group and means 7 for specifying a prescribed posterior probability corresponding to a prescribed condition among posterior probabilities of each Chinese medicine group, and specifying a prescribed Chinese medicine corresponding to the prescribed condition among Chinese medicines constituting a Chinese medicine group corresponding to the prescribed posterior probability to output the prescribed Chinese medicine.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】論理的に漢方薬の処方を支援することができる情報処理装置を提供する。【解決手段】症状と漢方薬の対応関係を示す対応情報が記憶される記憶部2と、特定症状を取得する手段3と、特定症状の事前確率と特定症状以外の症状の事前確率とを対応情報に基づいて算出する手段4と、複数の漢方薬のいずれかの組合せで構成される漢方薬群毎に、特定症状が生起したときに漢方薬群を構成するそれぞれの漢方薬が処方される条件付確率と特定症状以外の症状が生起したときに漢方薬群を構成するそれぞれの漢方薬が処方される条件付確率とを対応情報に基づいて算出する手段5と、漢方薬群毎に事前確率と条件付確率とに基づいて事後確率を算出する手段6と、漢方薬群毎の事後確率のうち所定の条件に該当する所定事後確率を特定し、所定事後確率に対応する漢方薬群を構成する漢方薬のうち所定
