The present invention relates to a syringe and a syringe safety cap assembly and, specifically, to a syringe safety cap assembly capable of preventing a user from being injured when a syringe needle is inserted into a cap and completely preventing reuse of the syringe or the syringe needle to be discarded. In addition, the present invention relates to the syringe having a valve member capable of filtering foreign substances during the inflow of a drug and restraining the filtered foreign substances from being discharged during the discharge of the drug, when foreign substances such as glass dust are mixed with substances such as a syringe drug. The present invention provides the syringe safety cap assembly comprising: an accommodation cap having a space into which at least a part of the syringe needle and a syringe body can be inserted and accommodated, and of which the shape is deformed so as to cause the shape of the syringe needle or the syringe body accommodated therein to be deformed when external force is applied； and a support part connected to the accommodation cap, thereby providing support power so as not to fall down when the accommodation cap is placed on the floor, wherein the support part has a curved outline, thereby guiding the accommodation cap so as to be ultimately erected on the floor while guiding the accommodation cap so as to swing left and right when placed on the floor.
