A safety needle assembly includes a needle and a protection cover. The needle is composed of a needle seat and a needle body. The protection cover has a needle accommodation room therein. The needle accommodation room has a barb therein. One side of a lower end of the protection cover is rotatable and connected to the needle seat. The barb is disposed in the needle accommodation room and integrally formed with the protection cover. A buckle mechanism is provided between the side wall of the needle accommodation room and the needle seat. The protection cover is directly connected to the needle seat, without a protection cover seat. The barb is integrally formed with the protection cover. The structure simpler and it is easy to be produced. The protection cover and the needle can be buckled reliably and safely.
