A torque sensing apparatus having: a torque adjusting assembly having: a fitting unit having: a first end; and a fixed plate mounted on the first end of the fitting unit; a regulating rod rotatably mounted through the fitting unit and the fixed plate having: a threaded part formed on the regulating rod and protruding out of the fixed plate of the fitting unit; and a regulating seat movably mounted on the threaded part of the regulating rod and located outside the fixed plate of the fitting unit and having: a screw hole formed through the regulating seat, and the threaded part of the regulating rod protruding through the screw hole of the regulating seat; the torque sensing apparatus being characterized in further comprising: a non-contact sensing assembly having: a first device mounted on the fixed plate of the fitting unit; and a second device mounted on the regulating seat, wherein the second device is kept from contacting the first device, and the first device or the second device detects a change of distance between the first device and the second device and then generates a signal. a torque adjusting assembly having: a fitting unit having: a first end; and a fixed plate mounted on the first end of the fitting unit; a regulating rod rotatably mounted through the fitting unit and the fixed plate having: a threaded part formed on the regulating rod and protruding out of the fixed plate of the fitting unit; and a regulating seat movably mounted on the threaded part of the regulating rod and located outside the fixed plate of the fitting unit and having: a screw hole formed through the regulating seat, and the threaded part of the regulating rod protruding through the screw hole of the regulating seat; the torque sensing apparatus being characterized in further comprising: a non-contact sensing assembly having: a first device mounted on the fixed plate of the fitting unit; and a second device mounted on the regulating seat, wherein the second device is kept from contacting the first device, and the first device or the second device detects a change of distance between the first device and the second device and then generates a signal. a fitting unit having: a first end; and a fixed plate mounted on the first end of the fitting unit; a first end; and a fixed plate mounted on the first end of the fitting unit; a regulating rod rotatably mounted through the fitting unit and the fixed plate having: a threaded part formed on the regulating rod and protruding out of the fixed plate of the fitting unit; and a threaded part formed on the regulating rod and protruding out of the fixed plate of the fitting unit; and a regulating seat movably mounted on the threaded part of the regulating rod and located outside the fixed plate of the fitting unit and having: a screw hole formed through the regulating seat, and the threaded part of the regulating rod protruding through the screw hole of the regulating seat; the torque sensing apparatus being characterized in further comprising: a non-contact sensing assembly having: a first device mounted on the fixed plate of the fitting unit; and a second device mounted on the regulating seat, wherein the second device is kept from contacting the first device, and the first device or the second device detects a change of distance between the first device and the second device and then generates a signal. a screw hole formed through the regulating seat, and the threaded part of the regulating rod protruding through the screw hole of the regulating seat; the torque sensing apparatus being characterized in further comprising: a non-contact sensing assembly having: a first device mounted on the fixed plate of the fitting unit; and a second device mounted on the regulating seat, wherein the second device is kept from contacting the first device, and the first device or the second device detects a change of distance between the first device and the second device and then generates a signal. a non-contact sensing assembly having: a first device mounted on the fixed plate of the fitting unit; and a second device mounted on the regulating seat, wherein the second device is kept from contacting the first device, and the first device or the second device detects a change of distance between the first device and the second device and then generates a signal. a first device mounted on the fixed plate of the fitting unit; and a second device mounted on the regulating seat, wherein the second device is kept from contacting the first device, and the first device or the second device detects a change of distance between the first device and the second device and then generates a signal.