A kind of gun stock structure includes shells, the outer cardiac defibrillator of automaton and electric shock patch. The side of shells has the accommodation groove of perforation what its upper surface and lower surface. The outer cardiac defibrillator system of automaton is installed in what accommodation groove and is pivotally connected shells and can pivot between what first position and the second position with respect to shells. The outer cardiac defibrillator of automaton includes shell and electric shock mould group. In the mould system that shocks by electricity accommodating what shell and to export an electric shock signal. Electric shock patch system is electrically connected what electric shock mould group and is respectively set in what shells, and two sides of electric shock patch system position what accommodation groove, aforementioned electric shock signal is exported by electric shock patch. It is masking accommodation groove when cardiac defibrillator position what first position outside automaton, and when the cardiac defibrillator position what second position outside automaton, accommodation groove system is exposed.一種槍托結構包含殼件、自動體外心臟去顫器及電擊貼片。殼件之一側具有貫通於其上表面與下表面之容置槽。自動體外心臟去顫器係容設於容置槽內並樞接殼件而可相對殼件樞轉於第一位置以及第二位置之間。自動體外心臟去顫器包含外殼及電擊模組。電擊模組係容置於外殼內而用以輸出一電擊訊號。電擊貼片係電性連接於電擊模組並分別設置於殼件上，電擊貼片係位於容置槽之二側，前述電擊訊號係藉由電擊貼片輸出。當自動體外心臟去顫器位於第一位置時，其係遮蔽容置槽，而當自動體外心臟去顫器位於第二位置時，容置槽係被顯露。
