Disclosed is a conventional syringe held within a sheath against the bias of a compression spring by a latch engaging an upper end of the compression spring which is also attached to an upper flange of the cylinder of said syringe. The lower end of said spring is attached to a rubber gasket or o-ring which is also attached to said sheath. At the lower end of the sheath is an opening for a needle which may be sealed by a pivoted spring biased disc when the needle is withdrawn into the sheath. The gasket and disc may include spongy material to absorb any liquid which may leak from the needle after withdrawal into the sheath. When the needle is to be disposed of, the syringe is depressed far enough to cam the latch out of engagement with the upper end of said compression spring enabling said compression spring to raise said syringe relative to said sheath enough to withdraw said needle into said sheath, thereby sealing the needle without subjecting the user to accidental pricks.