<p>A nailing device and a magazine of the nailing device. The magazine (5) comprises a magazine body (11) and a slider (12) slidable on the magazine body (11). A nail storage part (16) storing connection nails is formed between the magazine body (11) and the slider (12). A guide piece (17) guiding the shaft section tip sides of nails into an injection port is installed in the magazine body (11). A head section guide member (21) guiding the head sections of the nails is disposed slidably along the longitudinal direction of the magazine body (11). The head section guide member (21) is slid on the magazine body (11) according to the sliding operation of the slider (12) on the magazine body (11).</p>
