MAGNETIC SENSOR DEVICE

PROBLEM TO BE SOLVED: To provide a magnetic sensor device capable of facilitating assembly and suppressing manufacturing costs.SOLUTION: A magnetic sensor device 1 includes: a magnetic sensor 3 that detects a magnetic field changed based on a magnetic material 6 in which a terminal group 36 is mainly provided to an end part 31 to be one side and is close to or separated from a tip part 32 to be another side; and a magnet 5 that generates a magnetic field, and has a base part 50 and a first projection part 51 and a second projection part 52 provided so as to project from the base part 50, and in which the tip part 32 of the magnetic sensor 3 is inserted between the first projection part 51 and second projection part 52 so as to be on the base part 50 side.