To mount a wiper blade on a wiper arm with relatively simple structure so that a judder is hardly generated.

A mounting structure 10 has a connector 12 extending along an axial line of the wiper arm on a tip end of the wiper arm 11 capable of oscillating, and a holder 14 in the wiper blade 13. The holder 14 is detachably connected to the connector 12, and holds a wiper blade body 15 of the wiper blade 13. The connector 12 is arranged between both side wall parts so as to receive a pivot 21 arranged between both side wall parts 14b of the holder 14 in a U-shaped groove 24 thereof. The axial lines of the wiper arm 11 and of the wiper blade 13 are connected to overlap each other. In a state of connection of the wiper arm 11 to the wiper blade 13, a pair of engaging parts 27 of the connector 12 are engaged with an end part of the holder 14, and seat surfaces 27a of the engaging parts 27 are guided around the pivot 21 along an arc-shaped guiding surface 23 formed at the end part.

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