[SUMMARY] Objective: The aim of this study was to determine the effects of plant decorations on table impressions, appetite and meal satisfaction. Methods: Three different interventions (table decoration with flowers or leaves, and control) were tested on the same 20 participants at meals. In each group, the following were examined: differences in appetite, table impression, meal satisfaction, heart rate, and autonomic nervous system activity, before and after the intervention. Results: In appetite, “hunger” increased significantly when the table was decorated with flowers. Table impression was significantly greater in the flowers group and leaves group compared to the control group. Meal satisfaction was significantly higher in both the leaves group and the flowers group than in the control group. There was no significant difference in heart rate or parasympathetic activity among the three groups. Regarding sympathetic activity, it was higher in the flowers group than the control group at 5 minutes of rest after the intervention and 10 minutes after the meal. Also, in the flowers group, it was significantly higher than in the leaves group at 10 minutes after the meal. Conclusions: Our results suggested the following: 1) a table with leaves or flowers can provide a more favorable dining ambiance than an unadorned table, 2) leaves in particular have a relaxing effect and flowers have a cheerful and uplifting effect, 3) flower decorations enhanced the dining atmosphere, though they did not affect heart rate or parasympathetic activity.