Air deflector and air conditioner indoor unit

The utility model provides an air deflector and an air conditioner indoor unit. The air deflector is used for being installed on a shell of the air conditioner indoor unit and comprises a plate body, an installation arm and an installation rod. The plate body is used for guiding air and provided with a limiting pin. The mounting arm is used for being mounted on a shell. The installation rod is configured to be installed on the plate body in a reciprocating motion mode between a connection position connected with the installation arm and a separation position away from the installation arm. The mounting rod is provided with positioning parts, and when the mounting rod is located at the connecting position and the separating position, the positioning parts are located on the two sides of the limiting pin respectively, so that the positioning parts are stopped by the limiting pin, and the mounting rod is stably kept at the connecting position and the separating position. The problem that an air deflector of an e