A door hinge pin (20) for a portable electronic device (900) is provided. The door hinge pin includes a lead pin portion (201), a first pin body portion (202), a second pin body portion (204), a third pin body portion (203), and a tail pin portion (205), which connect with each other in such described order. The lead pin portion and the tail pin portion are respectively positioned substantially vertical to the first pin body portion and the third pin body portion. The first pin body portion is located in parallel with the third pin body portion. The first connecting pin portion is unsymmetrical with the second connecting pin portion about a first reference line X1. The first reference line X1 is defined parallel to the first pin body portion and the third pin body portion and located therebetween. Distance spaced between the first reference line X1 and the first pin body portion is substantially the same as that spaced between the first reference line X1 and the third pin body portion.