It is provided to efficiently perform a connection
insertion with respect to a connector housing (C1) repeatedly.A connector
insertion unit (1) comprises a housing
pallet (11), a
pallet holding frame (12) configured to hold two or more housing pallets (11) in a state where they move along a circulation
route (R11) from a housing feed position (121), a standby position (122), a connector
insertion position (123), and a housing removal position (124) in that order, and to return to the housing feed position (121) after housing removal, a connector insertion section (13), and a
pallet drive section (14) configured to cause housing pallets to move along the circulation
route (R11) to cause other housing pallets (11) to move to the standby position during a period beginning with the
receipt of the housing pallet (11) at the housing feed position and ending with the end of connector insertion at the connector insertion position. (122) to wait.