To provide an information processing device capable of ensuring not to execute processing not intended by a user in a case of stopping an ongoing operation after selecting an object (for example, in selecting again an object other than the object already selected, or the like). In a case where one of a user's designated position is included in a determination area based on the position of one of the plurality of objects displayed in a screen, an object moving unit moves the one object based on the one designated position. In a case where the object moving unit moves first and second objects, a collision determination unit determines whether or not the first and second objects have collided. A processing executing unit executes processing relevant to the first and second objects based on a result of determination by the collision determination unit.