The present technology relates to a camera unit and a mobile body capable of improving Electromagnetic Compatibility (EMC) performance. The camera unit includes a shield arranged at least on a side of one side surface of a sensor substrate to which an image sensor is attached and a contact portion that has conductivity and is provided on the sensor substrate so as to have contact with a portion on a side of a side surface of the sensor substrate of the shield. The present technology is applied to, for example, a camera unit or the like mounted on a mobile body such as a vehicle.