PROBLEM TO BE SOLVED: To provide a posture estimation learning system capable of efficiently creating machine learning data using data in a virtual space and executing posture estimation of a living body. A posture estimation data creation device 10A of a posture estimation learning system 1 includes an imaging unit 2 and a machine learning data creation unit 3 that creates machine learning data using a three-dimensional model of a living body. The posture estimation device 10B estimates the posture of the living body in the input image based on the machine learning unit 5 that learns the posture estimation of the living body based on the machine learning data and the posture estimation learning model 6 obtained by the machine learning. The posture estimation unit 7 is provided. The machine learning data creation unit 3 uses the three-dimensional skeleton data obtained by imaging the three-dimensional model by the imaging unit 2, the two-dimensional skeleton data obtained by projecting the three-dimensional skeleton data onto the two-dimensional coordinates, and the captured image. 3. Chroma key background image data Q in which the 3D model part and the background part are separated is created, and these are used for creating machine learning data. [Selection diagram] Fig. 1
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