Column device for liquid chromatography and liquid chromatography apparatus

A column device for liquid chromatography, comprising:

• a cylindrical column body that holds a column filler;
• a pair of end caps that cover the column body at both ends thereof, each end cap having a flow hole for a carrier liquid in the center thereof;
• a pair of columnar joint members including a large diameter portion arranged on one end thereof and a small diameter portion arranged on the other end thereof, in which an end surface on a side of the large diameter portion contacts end surfaces of the pair of end caps, each joint member having a communication hole which is arranged in the center of the joint member and agrees with the flow hole;
• a ring-like sealing member arranged so as to surround the flow hole and the communication hole between a contact surface between the end cap and the joint member;
• a bottomed cylindrical case that accommodates the pair of end caps and the large diameter portion of the pair of joint members in an engaged state;
• and
• a cover member detachably installed on a side of an opening of the case,
• wherein a bottom of the case includes a through-hole that holds the large diameter portion of one joint member of the pair of the joint member and allows the small diameter portion thereof to go through,
• wherein the cover member includes a through-hole that holds the large diameter portion of the other joint member of the pair of the joint member and allows the small diameter portion thereof to go through, and
• wherein the small diameter portion of the pair of joint members becomes a joint for a pipe constituting a flow path for the carrier liquid.