Automobile armrest

The utility model discloses an automobile armrest. The automobile armrest comprises a mounting plate and an armrest plate which is rotatably arranged on the mounting plate, a first limiting column and a second limiting column are respectively arranged on the mounting plate; a first arc-shaped groove and a second arc-shaped groove are respectively formed in the armrest plate; at least part of the first limiting column penetrates through the first arc-shaped groove, and at least part of the second limiting column penetrates through the second arc-shaped groove; a shell is arranged on the side, away from the mounting plate, of the armrest plate. A pin rod is arranged in the shell in a sliding mode, and pin holes corresponding to the pin rod are formed in the first limiting column and the second limiting column respectively. The problems that in the prior art, although the handrail structure can meet the requirement for rotation use of the handrail, the handrail is difficult to effectively lock when the handrail