Provided is a thin film depositing apparatus. The thin film depositing apparatus includes: a loading chamber loading a plurality of substrates; a first process chamber connected to the loading chamber and including a plurality of sputter guns inducing a first plasma on the plurality of substrates; a buffer chamber connected to the other side of the first process chamber facing the loading chamber; and a substrate transfer module simultaneously passing the plurality of substrates between the plurality of sputter guns during a process using the first plasma and transferring the plurality of substrates from the first process chamber to the buffer chamber.