Foot-operated controller of sewing machine

A foot-operated controller of a sewing machine, comprising:

• a first pedal that input a number of revolution of a sewing machine motor along with displacement of a position of the first pedal by stepping of a user;
• a second pedal that input a specific instruction along with a pressing of the user;
• a main body that supports the first pedal to be capable of displacing the position;
• and
• a support unit that supports the second pedal to be capable of being pressed, wherein
• the support unit is selectively attachable with respect to the main body in disposition where the second pedal is on a left side of the first pedal and disposition where the second pedal is on a right side of the first pedal,
• the main body holds a first element that detects the displacement of the first pedal and a second element that detects the pressing of the second pedal,
• the support unit is equipped with a transmission member that performs an advancing and retracting movement in conjunction with the pressing of the second pedal,
• the main body is equipped with a switch link that performs an input with respect to the second element in conjunction with the advancing and retracting movement of the transmission member, and
• in both cases where the second pedal is on the left side of the first pedal and where the second pedal is on the right side of the first pedal, across an interval between the main body and the support unit, the switch link performs the input to allow the second element to detect the pressing to the second pedal.