An ergonomic dual-purpose pillow for back sleeping and side sleeping includes breathable pores and elastic support columns spaced from one another and disposed at the middle of the thickness of the pillow. The quantity, width, arrangement density or height of each breathable pore and/or elastic support column can be adjusted to let the supporting force fed back by a central support section of the pillow be smaller than that of the two side support sections of the pillow, so as to overcome the central recession of the conventional pillow that is likely to cause the head to slip off and leads to sleep problems.
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