Shielding unit

A shielding unit, comprising:

• a shielding member in a form of a cylinder having conductivity;
• and
• a shielding shell connected to an end of the shielding member, the shielding shell comprising:
• a shell internal cylinder having an internal cylinder flange portion provided at an end of an internal cylindrical portion in a form of a cylinder consecutively;
• and
• a shell external cylinder having an external cylinder flange portion consecutively provided at an end of an external cylindrical portion in a form of a cylinder into which the internal cylindrical portion is press-fitted, wherein
• the shielding member is sandwiched by the external cylindrical portion and the internal cylindrical portion press-fitted into the external cylindrical portion,
• the internal cylinder flange portion includes either one of a positioning pin and a positioning guide hole which are engaged with each other under condition that the shielding member is sandwiched by the external cylindrical portion and the internal cylindrical portion press-fitted into the external cylindrical portion,
• the external cylinder flange portion includes the other of the positioning pin and the positioning guide hole;
• and
• the positioning pin and the positioning guide hole are configured to position and guide a relative rotational position of the shell internal cylinder in relation to the shell external cylinder in the sandwiched condition, in a circumferential direction of the internal cylindrical portion and the external cylindrical portion.