| Büchen | |
| Native Name Lang: | de |
| Settlement Type: | Amt |
| Subdivision Type: | Country |
| Subdivision Name: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Schleswig-Holstein |
| Subdivision Type3: | District |
| Subdivision Name3: | Lauenburg |
| Seat Type: | Region seat |
| Seat: | Büchen |
| Leader Title: | Amtsvorsteher |
| Leader Name: | Martin Voß |
| Area Total Km2: | 193,04 |
| Website: | amt-buechen.eu |
Büchen is an Amt ("collective municipality") in the district of Lauenburg, in Schleswig-Holstein, Germany. Its seat is in Büchen.
The Amt Büchen consists of the following municipalities (population in 2005 between brackets):
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