A wheel speed sensor has a detection element having at least one lead for detecting
a wheel speed, at least one terminal portion connected to the lead of the detection
element, a holder portion having a detection element fitting portion fitting the
detection element therein and a terminal portion fitting portion fitting the terminal
portion therein, and a resin sealed portion sealing the holder portion in a state
the detection element and the terminal portion connected with an electric wire
are held in the holder portion. The detection element fitting portion and the terminal
portion fitting portion are disposed such that the lead of the detection element
is brought into abutment with or proximity to a predetermined location of the terminal
portion when the detection element and the terminal portion are fitted in the detection
element fitting portion and the terminal portion fitting portion, respectively.