| Box Width: | 30em |
| İzmir–Denizli Regional | |
| Type: | Regional rail |
| Status: | Operating |
| Locale: | Western Anatolia |
| First: | 2010 |
| Operator: | TCDD Taşımacılık |
| Formeroperator: | Turkish State Railways |
| Start: | Basmane station, İzmir |
| Stops: | 18 |
| End: | Denizli station, Denizli |
| Journeytime: | 4 hours, 41 minutes |
| Frequency: | Daily |
| Class: | Classless |
| Access: | Limited |
| Seating: | Coach seating |
| Catering: | Trolley catering facilities |
| Entertainment: | TCDD promotional video loop is displayed in the in-train entertainment system |
| Stock: | TCDD MT30000 |
| Speed: | (Max speed) (Average speed) |
| Owners: | Turkish State Railways |
The İzmir–Denizli Regional (tr|Basmane–Denizli Bölgeseli), officially numbered as B38, is a long regional rail service operating daily between Basmane station in İzmir and Denizli station in Denizli. Trains are operated by TCDD Taşımacılık with a total journey time of 4 hours and 41 minutes.