Darb-e Koushk Gate of Qazvin is one of the oldest gates of Qazvin town which used to be the gate to Alamout, Roudbar, Koushks and northern hunting ground of Qazvin. It has an arch and semicircular shape.
Two arcades were built on each side of the corridor that are softly come out and implying an open arms status. This gate has only one view towards the suburban areas, and this view is tiled and Rasmi Bandi is used in it, and the inside looking wall is made of ordinary brick. The tiling of this building was done in the ruling time of Azed Al-Mulk Qajar.