Conventional syringes entail a risk that foreign substances in liquid medicine may be drawn into the syringe and subsequently injected into a patient. Known syringe filters may tend to be ineffective at filtering out foreign substances, and/or due to their porous structure and their location relative to the needle of the syringe may mean a significant force is required to draw the liquid medicine into the syringe. They may also prevent the liquid medicine from being drawn uniformly into the syringe. In providing a filtering syringe wherein a suction flow passage and an injection flow passage are at least partly independently formed, wherein a filter is associated with the injection flow passage but not the suction flow passage, the present invention may effectively prevent foreign substances contained in liquid medicine from being injected while also allowing the liquid medicine to be easily and conveniently drawn into the syringe.
