A pivoting mechanism includes a first bracket having a first sliding slot, a second bracket having a second sliding slot, a torsion structure located between the first bracket and the second bracket, a first and a second sliding members and a first and a second elastic arms. The first and the second brackets are respectively pivoted to a first and a second sides of the torsion structure. The first sliding member is pivotally connected to the first side and slidably disposed in the first sliding slot. The second sliding member is pivotally connected to the second side and is slidably disposed in the second sliding slot. The first elastic arm connects the first sliding member and leans against a first inclined sidewall of the first sliding slot. The second elastic arm connects the second sliding member and leans against a second inclined sidewall of the second sliding slot.