Electronic device including shielding member including structure for reducing deformation

An electronic device comprising:

• a housing including one surface supporting a display and another surface opposite to the one surface;
• a printed circuit board (PCB) including a ground pad and disposed in the housing;
• an optical sensor disposed on the PCB, and including:
• a light emitting unit configured to emit light toward the another surface of the housing, and
• a light receiving unit configured to receive light emitted from the light emitting unit and reflected from an object of an outside of the electronic device;
• and
• a shielding member covering the optical sensor and at least a portion of the PCB,
• wherein the shielding member includes:
• a first adhesive layer attached on the optical sensor and the ground pad,
• a first shielding layer electrically connected to the ground pad and disposed on the first adhesive layer, and
• a first cover layer disposed on the first shielding layer, and including a plurality of first particles configured to reflect or scatter light reflected inside of the housing after being emitted from the light emitting unit, a plurality of second particles configured to absorb the light reflected inside of the housing after being emitted from the light emitting unit, and a binder defining a mixture together with the plurality of first particles and the plurality of second particles by covering the plurality of first particles and the plurality of second particles.