Provided are a learning device and learning method whereby a model for performing image recognition for a medical image having a specific image quality can be efficiently generated, and a medical image processing device. A learning device (1) is provided with: a first learning unit (10) for generating a first model (M1) for performing image recognition for a medical image having a first image quality by learning using a first medical image group constituted from medical images having the first image quality; and a second learning unit (20) for generating a second model (M2) for performing image recognition for a medical image having a second image quality by learning using a second medical image group constituted from medical images having the second image quality, on the basis of the first model (M1) generated by the first learning unit (10). The second medical image group is constituted from medical images having the same image quality as a medical image to be recognized, and the first medical image group is constituted from medical images having a different image quality than the second image quality. The second learning unit (20) learns on the basis of a learning result of the first learning unit (10), and can therefore generate a highly precise model even when the second medical image group is small.La présente invention concerne un dispositif d'apprentissage et un procédé d'apprentissage au moyen desquels un modèle pour effectuer une reconnaissance d'image pour une image médicale ayant une qualité d'image spécifique peut être généré de manière efficace, ainsi qu'un dispositif de traitement d'image médicale. Un dispositif d'apprentissage (1) comporte : une première unité d'apprentissage (10) pour générer un premier modèle (M1) pour effectuer une reconnaissance d'image pour une image médicale ayant une première qualité d'image par apprentissage à l'aide d'un premier groupe d'images médicales constitué d'images médicales ayant la première qualité d'image ; et une