How to say "part-timer" in Japanese

• パートタイマーCommon
  nounThe most direct equivalent of 'part-timer': someone employed for only part of the regular working week. As the full loanword it sounds neutral, and it is a safe choice in writing as well as conversation.
  スーパーマーケットでは多おおくのパートタイマーを雇やとった。↗

  The supermarket hired many part-timers.
• パートJLPT N4approx.Common
  nounThe same sense, in the everyday shortened form of パートタイマー. It is the word workplaces typically use for their part-time staff, so it suits talk of employment and coworkers.
• バイトCommon
  nounShort for アルバイト, it refers to the job as much as to the person, with a casual nuance — the kind of part-time work typically associated with students.

All three mean someone who works part time: 「パートタイマー」 is the direct loanword, 「パート」 its everyday abbreviation, and 「バイト」 the casual word, often for the job as much as the person.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• パートタイマーpart-timer
• アルバイターpart-time worker
• パートpart-timer
• バイトpart-time worker