A rocker-type assembly device for a wiper includes a wiper fastening base (1), a connection base (2), and a control member (3). The wiper fastening base (1) is fixed to a wiper body (900) and has a shaft (11) and a buckling portion (12). The connection base (2) is combined with the wiper fastening base (1) and has a shaft groove (21) receiving the shaft (11). The connection base (2) swings in a rocker-like manner about the shaft (11) as a pivot. The swing arm (800) is assembled to the connection base (2). The control member (3) includes a buckling body (31) and swings together with the connection base (2) to drive the buckling body (31) to be engaged with the buckling portion (12) or disengaged from the buckling portion (12).