A height adjustment pillow comprising: a left body and a right body arranged at an interval so as to be spaced apart from each other; and an elastic middle body connecting the left body with the right body therebetween and capable of being elastically transformed, wherein at least any one of the left body and the right body comprises: a lower member (10A, 10B); an upper member (20A, 20B) arranged on the lower member (10A, 10B); and a lifting device (30A, 30B) adjusting a height of the upper member (20A, 20B) with respect to the lower member (10A, 10B) by moving the upper member (20A, 20B) up and down, wherein the lifting device (30A, 30B) comprises: a drive shaft arranged in the upward and downward directions by passing through the lower member (10A, 10B) with a lower end part thereof protruding from a lower part of the lower member (10A, 10B) and having a manipulation handle provided in the protruding lower end part; at least one or more rotation members mounted to an upper part of the lower member (10A, 10B) to be rotatable relative to upward and downward directional shafts thereof in adjacent areas of the drive shaft; a power train transmitting a rotational force of the drive shaft to the rotation members; and a lifting operation equipment (360, 370) converting a rotational movement of the rotation member into a rectilinear movement of the upward and downward directions proportional to a rotation angle of the rotation member with respect to the upper member (20A, 20B) so as to lift and lower the upper member (20A, 20B), wherein a receiving groove part (12A, 12B) is provided in the lower part of the lower member (10A, 10B) to receive the lower end part and the manipulation handle. a left body and a right body arranged at an interval so as to be spaced apart from each other; and an elastic middle body connecting the left body with the right body therebetween and capable of being elastically transformed, wherein at least any one of the left body and the right body comprises: a lower member (10A, 10B); an upper member (20A, 20B) arranged on the lower member (10A, 10B); and a lifting device (30A, 30B) adjusting a height of the upper member (20A, 20B) with respect to the lower member (10A, 10B) by moving the upper member (20A, 20B) up and down, a lower member (10A, 10B); an upper member (20A, 20B) arranged on the lower member (10A, 10B); and a lifting device (30A, 30B) adjusting a height of the upper member (20A, 20B) with respect to the lower member (10A, 10B) by moving the upper member (20A, 20B) up and down, wherein the lifting device (30A, 30B) comprises: a drive shaft arranged in the upward and downward directions by passing through the lower member (10A, 10B) with a lower end part thereof protruding from a lower part of the lower member (10A, 10B) and having a manipulation handle provided in the protruding lower end part; at least one or more rotation members mounted to an upper part of the lower member (10A, 10B) to be rotatable relative to upward and downward directional shafts thereof in adjacent areas of the drive shaft; a power train transmitting a rotational force of the drive shaft to the rotation members; and a lifting operation equipment (360, 370) converting a rotational movement of the rotation member into a rectilinear movement of the upward and downward directions proportional to a rotation angle of the rotation member with respect to the upper member (20A, 20B) so as to lift and lower the upper member (20A, 20B), wherein a receiving groove part (12A, 12B) is provided in the lower part of the lower member (10A, 10B) to receive the lower end part and the manipulation handle. a drive shaft arranged in the upward and downward directions by passing through the lower member (10A, 10B) with a lower end part thereof protruding from a lower part of the lower member (10A, 10B) and having a manipulation handle provided in the protruding lower end part; at least one or more rotation members mounted to an upper part of the lower member (10A, 10B) to be rotatable relative to upward and downward directional shafts thereof in adjacent areas of the drive shaft; a power train transmitting a rotational force of the drive shaft to the rotation members; and a lifting operation equipment (360, 370) converting a rotational movement of the rotation member into a rectilinear movement of the upward and downward directions proportional to a rotation angle of the rotation member with respect to the upper member (20A, 20B) so as to lift and lower the upper member (20A, 20B), wherein a receiving groove part (12A, 12B) is provided in the lower part of the lower member (10A, 10B) to receive the lower end part and the manipulation handle.