Gyeongbu Line
The Gyeongbu Line (Gyeongbuseon) is the most important railway line in South Korea and one of the oldest, connecting Seoul to Suwon, Daejeon, Daegu, and Busan. The Gyeongbu Line is by far the most heavily travelled rail line in South Korea, and high-speed, express, local, and freight trains provide frequent service along its entire length.
The Gyeongbu Line is the major route out of Seoul and Yongsan Stations, and in addition to regular departures for Busan, trains travel along the Gyeongbu Line en route to Janghang, Gwangju, Mokpo, Suncheon, Yeosu, Pohang, Ulsan, Haeundae, Masan, and Jinju. Trains for Jecheon, Andong, and Yeongju also operate along sections of the Gyeongbu Line.
The most frequent passenger service on the line is provided by Seoul Subway Line 1 on the section between Seoul Station, Guro (where roughly half the subway trains leave the Gyeongbu Line to head out to Incheon via the Gyeongin Line), Suwon, and Byeongjeom.
The Gyeongbu Line is currently 6-tracked from Seoul to Guro, 4-tracked from Guro to Cheonan, and double-tracked from Cheonan all the way to Busan. The 4-track section from Suwon to Cheonan was electrified on January 20, 2005.
The table below gives the English, Hangul, and Hanja names of the major stations and junctions on the Gyeongbu Line, together with connecting passenger lines and the cities served directly and indirectly by the connecting lines.
| Station | Hangul | Hanja | Connecting Line | To... | Connections to... | Comments |
| Seoul | 서울 | n/a | Gyeongui Line | Dorasan | Gyeongui Line originally went to Kaesŏng, P'yŏngyang, and Sinŭiju in what is now North Korea | |
| Yongsan | 용산 | 龍山 | Gyeongwon Line | Uijeongbu, Shintanni | Gyeongwon Line originally went to Wŏnsan in what is now North Korea | |
| Yeongdeungpo | 영등포 | 永登浦 | Major stop in southern Seoul for express trains | |||
| Guro | 구로 | 九老 | Gyeongin Line | Incheon | ||
| Suwon | 수원 | 水原 | ||||
| Cheonan | 천안 | 天安 | Janghang Line | Janghang | ||
| Jochiwon | 조치원 | 鳥致院 | Chungbuk Line | Cheongju, Chungju | Jecheon, Andong | |
| Daejeon | 대전 | 大田 | Honam Line | Iksan, Gwangju, Mokpo | Jeonju, Suncheon, Yeosu, Jinju | Honam Line trains actually stop at Seodaejeon (서대전; 西大田; "West Daejeon"), a few km west of Daejeon Station |
| Gimcheon | 김천 | 金川 | Gyeongbuk Line | Yeongju | Gangneung | |
| Daegu | 대구 | 大邱 | Dongdaegu (not Daegu) is the major station for Daegu | |||
| Dongdaegu ("East Daegu") | 동대구 | 東大邱 | Daegu Line | Yeongcheon | Gyeongju, Pohang, Ulsan | |
| Samnangjin | 삼랑진 | 三浪津 | Gyeongjeon Line | Masan, Jinju, Suncheon, Gwangju | Mokpo | |
| Gupo | 구포 | 龜浦 | Gaya Line | Haeundae | ||
| Busanjin | 부산진 | 釜山鎮 | Donghae Nambu Line | (no passenger train service) | ||
| Busan | 부산 | 釜山 | Southern terminus |
