How to Use Subway Lockers in Seoul

Where can you find subway lockers in Seoul?

Seoul's subway luggage lockers go by the name T-Locker (또타라커), Seoul Metro's station locker service. As of late September 2026, Seoul Metro's official page lists T-Locker at 273 stations across 336 spots, with 5,557 compartments in total — but those numbers can change over time, and not every station has the same number of lockers. Bigger hub stations tend to have more lockers than small local stops, so do not assume one will be free, or even present, at every station you pass through.

How do you use a subway locker?

Seoul Metro's usage guide says the newer T-Locker door locks work through the official T-Locker app. The general flow looks like this:

1. 1. Open the T-Locker app and check which lockers near you are available.
2. 2. Choose a locker size that fits your bag.
3. 3. Follow the in-app instructions to select that specific locker.
4. 4. Pay through the app.
5. 5. Put your bag inside and close the door.
6. 6. Make sure the door actually locks before you walk away.
7. 7. Save your retrieval information in the app, or take a screenshot.
8. 8. When you return, open the app and follow the retrieval steps to unlock the same locker.

Locker screens and door types can vary a little from station to station, so if what is in front of you does not exactly match what you expect, follow the on-screen or in-app instructions at that specific locker rather than assuming every T-Locker works identically.

How much do Seoul subway lockers cost?

Pricing is based on a 4-hour base rate, then an hourly charge after that, and it is higher on weekends and public holidays than on weekdays. Based on Seoul Metro's official fee table:

Prices can change over time, so treat these as a current reference rather than a permanent guarantee — the app always shows the live rate before you pay.

What size locker do you need?

Small (about 50 × 30 × 60 cm) suits a daypack or a small bag. Medium (about 50 × 45 × 60 cm) fits most carry-on suitcases. Large (about 50 × 90 × 60 cm) is built for a bigger checked-size suitcase. Measurements matter more than luggage labels here — a bag marketed as “carry-on” by an airline is not always the same size as what a locker actually measures, so it is worth checking your bag's real dimensions against the locker sizes above rather than guessing.

What time can you use the lockers?

T-Locker operates from 05:00 to 24:00, every day of the week, including weekends and public holidays. Outside that window, you cannot store a new bag or retrieve one that is already inside — so plan your storage and pickup times around those hours, especially on a late-night arrival or a very early departure.

Do you need the T-Locker app?

For the newer lockers, Seoul Metro's usage guide says checking availability, paying, storing, and retrieving are all done through the T-Locker app — so yes, plan to install it before you need a locker, not after. The app's official store listing currently shows support for English, Japanese, Korean, and Simplified Chinese, so it is not a Korean-only interface.

A practical heads-up: some travelers have reported the app occasionally showing a locker as occupied when it is actually free (or the reverse), and a few have run into login or payment hiccups. None of that is guaranteed to happen to you, but it is worth having a backup plan — a different bank of lockers nearby, or calling the T-Locker customer line — if the app does not cooperate.

What if your suitcase doesn't fit?

If your bag does not fit even the large T-Locker size, check whether a bigger hub station nearby has more or larger lockers, since availability is not identical across stations. For an oversized suitcase, or if you would rather hand your bag over in person than use a self-service locker, T-Locker's sister service T-Luggage (또타러기지) is worth knowing about — but do not confuse the two. T-Luggage is a separate luggage storage and same-day delivery service that you use in person at the station (or book online). Seoul Metro's page currently lists six locations: Seoul Station, Hongik University, Jamsil, Myeongdong, Gimpo Airport, and Jongno 3-ga. It has its own size-based pricing (measured in inches) and runs 09:00–22:00, every day.

Quick tips before you store your bag

• •Take a quick photo of the locker number and the nearby exit — one useful habit that saves you from hunting later.
• •Keep your retrieval information (in the app, or on your phone) safe until you come back for your bag.
• •Check the operating hours before you store anything — you cannot retrieve a bag outside them.
• •Extra hourly charges add up if you stay out longer than planned, so check the base hours for your size.
• •Don't assume every station has the same number of lockers, or the same sizes available — a bigger hub is a safer bet than a small local stop.