Chemical heat storage device including rotatable heat storage material accommodation unit

Provided is a chemical heat storage device including: a heat storage material accommodation unit which accommodates a chemical heat storage material which generates heat and a reaction product by reversible chemical reaction with a reaction medium, a driving unit which drives rotation of the heat storage material accommodation unit, and a heat exchange unit which includes a heat transfer unit which extends in at least one heat storage material accommodation unit, and is thermally communicated with the inside and the outside of the heat storage material accommodation unit, in which the chemical heat storage material is stirred by rotation of the heat storage material accommodation unit, heat exchange is performed between heat exchange fluid which flows through the heat transfer unit and the chemical heat storage material, and a temperature of the heat exchange fluid which flows through the heat transfer unit is changed.