Disposable syringe set having improved compatibility

A syringe set with improved engageability, the syringe set having a structure comprising:

• a syringe barrel in which a medicinal fluid inlet of a predetermined length is formed to protrude at one side and a plunger is fitted and coupled to an opening at the other side;
• a first screw-coupling portion formed on an outer circumference of the medicinal fluid inlet;
• a syringe needle hub in which a syringe needle is provided and which is configured to be fitted and coupled to the outer circumference of the medicinal fluid inlet;
• and
• a second screw-coupling portion formed on an inner circumference of the syringe needle hub and configured to be coupled to the first screw-coupling portion,
• wherein the first screw-coupling portion is formed as a female-thread-type coupling portion having a diameter (d) smaller than a reference diameter (D) of the medicinal fluid inlet,
• the second screw-coupling portion provided on the inner circumference of the syringe needle hub is formed as a male-thread-type coupling portion configured to be coupled to the female-thread-type coupling portion, and
• a catching step having an annular shape is formed to protrude a predetermined height from an inner side end of the male-thread-type coupling portion formed on the inner circumference of the syringe needle hub.