A resonant sensor device comprising: a base ; and a detection substrate supported by being at least partially fixed to the base , wherein the detection substrate comprises: a movable portion configured to move in a first direction (z), and is disposed away from the base in the first direction (z); a supporter comprising one or more supporting portions which extend in a direction along an intersecting plane intersecting the first direction (z), the supporter being disposed away from the base in the first direction (z); an intermediate fixing portion which is connected to the movable portion via the supporter , the intermediate fixing portion being disposed away from the base in the first direction (z); a mounting portion fixed to the base ; a connection portion which connects the mounting portion to the intermediate fixing portion in a second direction (x) that is one direction along the intersecting plane, the connection portion being disposed away from the base in the first direction (z); and a resonator (R1) at least partially embedded in the one or more supporting portions, wherein a maximum dimension of the connection portion in a third direction (y) orthogonal to the second direction (x) in the intersecting plane is smaller than a maximum dimension of the supporter in the third direction (y). a base ; and a detection substrate supported by being at least partially fixed to the base , wherein the detection substrate comprises: a movable portion configured to move in a first direction (z), and is disposed away from the base in the first direction (z); a supporter comprising one or more supporting portions which extend in a direction along an intersecting plane intersecting the first direction (z), the supporter being disposed away from the base in the first direction (z); an intermediate fixing portion which is connected to the movable portion via the supporter , the intermediate fixing portion being disposed away from the base in the first direction (z); a mounting portion fixed to the base ; a connection portion which connects the mounting portion to the intermediate fixing portion in a second direction (x) that is one direction along the intersecting plane, the connection portion being disposed away from the base in the first direction (z); and a resonator (R1) at least partially embedded in the one or more supporting portions, a movable portion configured to move in a first direction (z), and is disposed away from the base in the first direction (z); a supporter comprising one or more supporting portions which extend in a direction along an intersecting plane intersecting the first direction (z), the supporter being disposed away from the base in the first direction (z); an intermediate fixing portion which is connected to the movable portion via the supporter , the intermediate fixing portion being disposed away from the base in the first direction (z); a mounting portion fixed to the base ; a connection portion which connects the mounting portion to the intermediate fixing portion in a second direction (x) that is one direction along the intersecting plane, the connection portion being disposed away from the base in the first direction (z); and a resonator (R1) at least partially embedded in the one or more supporting portions, wherein a maximum dimension of the connection portion in a third direction (y) orthogonal to the second direction (x) in the intersecting plane is smaller than a maximum dimension of the supporter in the third direction (y). <EOS>