PROBLEM TO BE SOLVED: To provide a learning device, an estimation device, a learning method, an estimation method and a program which can improve the prediction accuracy on whether or not a bile duct cannulation is difficult.SOLUTION: A learning device includes: an acquisition unit which acquires a plurality of pieces of information in which an image of a Vater's papilla of a duodenum of a bile duct is associated with information indicating a cannulation method being the method of inserting a catheter into the bile duct; a learning unit which machine-learns the information indicating the cannulation method as teacher data on the basis of the image of the Vater's papilla of the duodenum of the bile duct; and a storage unit which stores the result of the machine-learning of the learning unit in association with the information indicating the cannulation method.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】胆管カニュレーションが困難であるか否かの予測精度を向上できる学習装置、推定装置、学習方法、推定方法、およびプログラムを提供すること。【解決手段】学習装置は、胆管の十二指腸ファータ乳頭の画像と、胆管にカテーテルを挿入した方法であるカニュレーション方法を示す情報とを関連付けた情報を複数取得する取得部と、胆管の十二指腸ファータ乳頭の画像に基づいて、カニュレーション方法を示す情報を教師データとして、機械学習する学習部と、学習部が機械学習した結果とカニュレーション方法を示す情報とを関連付けて記憶する記憶部とを備える。【選択図】図2