Cap for capping ink discharge opening of nozzle head in ink-jet recording apparatus

A cap for capping an ink discharge opening of a nozzle head, comprising:

• a cap main body configured to cap the ink discharge opening;
• and
• an atmosphere communication unit configured to couple an internal space of the cap main body to atmosphere in a state where the cap main body caps the ink discharge opening, wherein
• the cap main body is configured to couple the internal space to the ink discharge opening in a state where the ink discharge opening is capped,
• the atmosphere communication unit includes:
• a venthole integrally formed to the cap main body, and
• a tube coupled to the venthole so as to couple the internal space to atmosphere, and a tube holding unit that engageably/disengageably holds the tube, and
• the tube includes one end coupled to the venthole using press fitting;
• and the tube holding unit is formed of synthetic resin and includes a cap engaging portion to couple the tube holding unit to the cap main body, and
• the cap engaging portion engages the cap main body by being urged against the cap main body in a direction within a plane approximately parallel to a bottom surface of the nozzle head.