The present invention relates to an assistant device for cracking a walnut, which is configured such that when a first holder and a second holder hold and crack the walnut and are then released, the first holder and the second holder are elastically rotated by an elastic member, and simultaneously, the cracked walnut and small walnut shells are automatically accommodated in a walnut accommodating recess by the first holder, so that the assistant device can be conveniently used. To this end, an assistant device for cracking a walnut according to the present invention includes: a base part, which includes a fixing plate disposed on an upper surface of the base part at a lateral side thereof, a walnut accommodating recess disposed on an upper surface of the base part at another lateral side thereof, and a semi-spherical alignment recess disposed on an upper surface of the base part at a longitudinal side thereof and including a hitting assistant rib a first holder which has an end part rotatably disposed on an upper surface of the base part at another longitudinal side thereof and is provided to a first semi-circular walnut holding recess in a side surface of another end part corresponding to the location of the alignment recess a second holder which has an end part rotatably disposed on the upper surface of the base part at the second longitudinal side to neighbor the first holder and is provided to a second semi-circular walnut holding recess in a side surface of another end part facing the first semi-circular walnut holding recess a first elastic member disposed between the fixing plate and the first holder to elastically rotate the first holder through a predetermined angle from the fixing plate and a second elastic member disposed between the first holder and the second holder to elastically rotate the second holder through a predetermined angle from the first holder.COPYRIGHT KIPO 2015본 발명은 제1협지대와 제2협지대로 호두를 잡고 호두를 깬 상태에서 제1협지대와 제2협지대를 놓으면, 제1협지대와 제2협지대가 탄성부재에 의해