My sun visor fell off because this plastic thing cracked. Does anyone know what it is called im looking for a new one. It holds the visor to the roof of the car.

"This plastic thing".......hmmmm, well, maybe just take it to your local Toyota dealer and they can match the part for you.

I believe that you will have to replace the entire visor since, it is one assembly.... Try your local salvage yards..
I had a '95 Camry, had a wreck & my head broke the sun visor plastic mount...