Abstract: The present invention provides a substitutive pillow, which feels like a real arm pillowing one's head and provides a variety of modes of use. In a substitutive pillow formed in mimicry of human torso and arm, the arm part includes an upper arm part 2a mimicking a human upper arm and a forearm part 2b mimicking a human forearm which is capable of bending relatively with the upper arm part 2a. By this structure, this pillow feels like a real arm pillowing one's head and gives unity and ease, with which the users sleep well. Further, it can be suitable for various modes of use.