Abstract: A medical instrument is assembled by inserting a mating portion of a first tubular member of flexible resin having a Shore D hardness of 45 or lower into a mating portion of a second tubular member of flexible resin having a Shore D hardness of 45 or lower. The mating portions are joined with a curable, preferaly UV curable, adhesive which shows a Shore D hardness of 70 or lower after curing, thereby forming a firm bond.

Abstract: A medical instrument for transferring liquid therethrough is provided, comprising a connector of a rigid resin including a generally cylindrical portion having a passage extending throughout the connector and one open end, the cylindrical portion at said one open end including a recess extending circumferentially and axially from the open end, the outside surface of the recess being provided with at least one substantially circumferential rib; and a tube of a flexible resin inserted into the recess and bonded thereto with an adhesive to define a continuous passage communicating the connector and the tube.