The present invention relates to a self-assembly shovel formed by injection molding with a synthetic resin. The self-assembly shovel is formed as follows: a lower supporting rod (22) forming a shovel handle (20) including a shovel blade body (10) is integrally formed by injection molding； an upper supporting rod (24) forming the shovel handle (20) including a handle (30) is integrally formed by injection molding； a coupling tool (46) therein a crisscross coupling protrusion (42) is formed on an upper part of the lower supporting rod (22) forming the shovel handle (20) and a crisscross coupling groove (44) is formed on a lower part of the upper supporting rod (24)； the coupling protrusion (42) and the coupling tool (46) are coupled by insertion fitting； and the coupling tool (46) is coupled by tightening like a screw with a tightening nut (48) in which a screw unit (48b) is formed, thereby being easy to manufacture through injection molding and becoming lighter. The shovel handle (20) is formed by injection molding with a synthetic resin so as to enhance durability, thereby minimizing damage and preventing the shovel handle from being slipped out of a hand. In addition, the shovel handle (20) is formed to be separated into the upper and lower parts so as to assemble and couple the upper supporting rod (24), which is formed to be integrated with the handle, to the lower supporting rod (22), which is formed to be integrated with the shovel blade body (10), using a coupling member (40), thereby facilitating a handling and a use of the shovel after the fact.본 발명은 합성수지로 사출 성형하여 구성하는 조립용 삽에 관한 것으로서, 삽날 본체(10)를 포함하여 삽자루(20)를 구성하는 하부 지지봉(22)을 일체로서 사출성형하며 손잡이(30)를 포함하여 삽자루(20)를 구성하는 상부 지지봉(24)을 일체로 사출성형하되, 상기 삽자루(20)를 구성하는 하부 지지봉(22)의 상부에는 십자형 결합돌부(42)를 형성하고, 상부 지지봉(24)의 하부에는 십자형 삽입홈(44)이 형성된 체결구(46)를 형성하고, 결합돌부(42)와 체결구(46)를 끼움 맞춤 결합하고, 내면에 경사진 나사부(48b)가 형성된 조임너트(48)에 의해 체결구(46)가 나사식으로 조임 체결되게 구성하여 줌으로써 사출 성형에 따른 제작이 용이하면서 경량화하고, 삽자루(20)를 합성수지로서 성형에 따른 내구성을 강화하여 파손을 최소화하면서 작
