A manual knitting device comprising: a plurality of pin members (40, 240) each comprising a shaft portion and a protuberant portion which is formed on the shaft portion; a first base member (10,210) having a first common hole portion (14, 214), which is opened in a vertical direction and formed so that the shaft portion of a first pin member can be inserted into the first common hole portion (14, 214) and the first base member (10, 210) being formed into a short rod shape; and a second base member (20, 220) having a second common hole portion (24, 224) which is formed so that the shaft portion of the first pin member can be inserted into the second common hole portion (24, 224) and the second base member (20, 220) being formed into a short rod shape, wherein the first common hole portion (14, 214) and the second common hole portion (24, 224) combine coaxially to form a hole into which the first pin member (40, 240) can be inserted, and wherein the first base member (10, 210) and the second base member (20, 220) are formed so as to rotate relatively about the hole formed by the first common hole portion (14, 214) and the second common hole portion (24, 224), and the first base member (10, 210) and the second base member (20, 220) together form a connecting engaging portion which is engaged or released by the relative rotation of the first base member (10, 210) and the second base member (20, 220), characterized in that the connecting engaging portion is formed by a connecting engagement recess portion (16, 226), which is formed on either of the first base member (10, 210) and the second base member (20, 220) on an arc-shaped inter-piece wall (13b, 213b) and comprises a groove extending in the vertical direction, and a connecting engagement projecting portion (21a1, 211a), which is formed on the other of the first base member (10, 210) and the second base member (20, 220). a plurality of pin members (40, 240) each comprising a shaft portion and a protuberant portion which is formed on the shaft portion; a first base member (10,210) having a first common hole portion (14, 214), which is opened in a vertical direction and formed so that the shaft portion of a first pin member can be inserted into the first common hole portion (14, 214) and the first base member (10, 210) being formed into a short rod shape; and a second base member (20, 220) having a second common hole portion (24, 224) which is formed so that the shaft portion of the first pin member can be inserted into the second common hole portion (24, 224) and the second base member (20, 220) being formed into a short rod shape, wherein the first common hole portion (14, 214) and the second common hole portion (24, 224) combine coaxially to form a hole into which the first pin member (40, 240) can be inserted, and wherein the first base member (10, 210) and the second base member (20, 220) are formed so as to rotate relatively about the hole formed by the first common hole portion (14, 214) and the second common hole portion (24, 224), and the first base member (10, 210) and the second base member (20, 220) together form a connecting engaging portion which is engaged or released by the relative rotation of the first base member (10, 210) and the second base member (20, 220), characterized in that the connecting engaging portion is formed by a connecting engagement recess portion (16, 226), which is formed on either of the first base member (10, 210) and the second base member (20, 220) on an arc-shaped inter-piece wall (13b, 213b) and comprises a groove extending in the vertical direction, and a connecting engagement projecting portion (21a1, 211a), which is formed on the other of the first base member (10, 210) and the second base member (20, 220).