To provide a non-resonant knocking sensor capable of suppressing deterioration of insulation inside and reducing production cost. SOLUTION: A weight 19 is disposed between a metallic shell 9 including a metal member side cylindrical portion 13 and a metal side flange portion 15, a piezoelectric element 17, and a metal side flange portion with a piezoelectric element interposed therebetween, a third A sensor main body having a through hole 31h through which the metal shell side tubular portion is inserted and a fixing portion 31 for fixing the weight against the metal side collar portion, and a resin molded body 3 1, and the fixing portion has a flow path 31 r for allowing resin to flow into the internal space 20 between the metallic shell side tubular portion and the piezoelectric element, and the flow path is connected to the third through hole And the third through hole, and is provided in a plurality of intermittently along the circumferential direction of the fixed portion. (FIG.
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