A tray assembly configured for carrying a storage device is provided. The tray assembly includes a carrier, a base frame, a handle and a connecting rod. The carrier carries the storage device. The base frame slidably connects with the carrier, allowing the carrier to slide between a first position and a second position relative to the base frame. The base frame includes a locking part and the handle pivots to the base frame. Two ends of the connecting rod respectively pivot to the carrier and the handle. When the handle rotates relative to the base frame and drives the carrier to slide to the first position, the carrier is carried on the base frame and the handle locks up with the locking part. When the handle rotates relative to the base frame and drives the carrier to slide to the second position, the carrier tilts relative to the base frame.