A pivoting mechanism includes a first bracket, a second bracket, a torsion structure, a first sliding member, a second sliding member, a first elastic arm and a second elastic arm. The first bracket has a first sliding slot. The second bracket has a second sliding slot. The torsion structure is located between the first bracket and the second bracket. The first bracket is pivoted to a first side of the torsion structure, and the second bracket is pivoted to a second side of the torsion structure. The first sliding member is pivotally connected to the first side of the torsion structure and slidably disposed in the first sliding slot. The second sliding member is pivotally connected to the second side of the torsion structure 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.