| Ainoki Station | |
| Native Name: | 相ノ木駅 |
| Native Name Lang: | ja |
| Address: | 47 Shoinshin Kamiichi-machi, Nakaniikawa-gun, Toyama-ken 930-0358 |
| Country: | Japan |
| Operator: | 18px Toyama Chihō Railway |
| Line: | Toyama Chihō Railway Main Line |
| Distance: | 11.3 km from |
| Platforms: | 1 side platform |
| Tracks: | 1 |
| Status: | Unstaffed |
| Opened: | 1 September 1931 |
| Rebuilt: | 1949 |
| Closed: | 1944-1949 |
| Former: | Kyōden Station (to 1936) |
| Map Type: | Japan |
is a train station in the town of Kamiichi, Nakaniikawa District, Toyama Prefecture, Japan.
Ainoki Station is served by the Toyama Chihō Railway Main Line, and is 11.3 kilometers from the starting point of the line at .
The station has one ground-level side platform serving a single bi-directional track. The station is unattended.
Ainoki Station was opened on 1 September 1931 as at a location approximately 700 meters in the direction of Kamiichi Station. It was renamed to its present name on 1 October 1936, and was closed on 18 May 1944. It was relocated to its present location and reopened as Ainoki Station on 15 April 1949.