The purpose of the study is to assess the effectiveness of communication board on the communication pattern and level of satisfaction among the patients on mechanical ventilator in IMS & SUM Hospital, Bhubaneswar, Odisha. Critically ill patients often have their usual means of communication interrupted or limited, either mechanically by endotracheal intubation or by the effect of drugs, at a time when the need for the information and expression of anxieties is great. Deficiency in communication ranks as one of the most negative experiences in the studies of perception of intubated patients. A retrospective study was conducted on stressful experiences of patients who received mechanical ventilation in an ICU; a majority of subjects (78.1%) remembered having trouble speaking during ventilator treatment. Most of those subjects (82.7%) rated speaking difficulties as moderately to extremely bothersome. Incidentsof Panic were associated with not being able to talk because of endotracheal intubation. The approach/design of the study was Evaluatory approach/ Pre-Experimental one group pre-test post-test research design, which was carried out among 60 patients; those are on mechanical ventilator in IMS & SUM Hospital, Bhubaneswar, Odisha, selected by Non-Probability purposive sampling technique. An exclusive review of literature helped in preparation of data collection tools to assess the communication pattern and to assess the level of satisfaction among the patients those are on mechanical ventilator. Structured Questionnaires were administered to collect demographic data & data on communication pattern and level of satisfaction. The techniques used for data collection are interview & self structured rating scale. The analysis of the obtained data was based on the objective of the study. Descriptive & inferential statistics was used for data analysis & data interpretation. Results of the study revealed that mean post test score of communication pattern is 134.4, which is higher than mean pre test score of communication pattern 78.85. The standard deviation of post test 6.689143 is less than standard deviation of pre test 7.161159 which indicates that the group was more homogenous in post test. It inferred that there is a marked improvement in communication pattern in post test than pre test. Mean post test score of satisfaction level is 36.9, which is higher than mean pre test score of satisfaction level 31.4. The standard deviation of post test 2.51 is less than standard deviation of pre test 2.55 which indicates that the group is more homogenous in post test. It inferred that there is a marked improvement in satisfaction level in post test than pre test. There is significant positive relationship between communication pattern and level of satisfaction of the patients with mechanical ventilator. The calculated r value is 0.25 (before using communication board) & 0.29 (after using communication board) indicate high significant relationship between communication pattern and level of satisfaction of the patients with mechanical ventilator. It was concluded that, there was a significant improvement in communication pattern and level of satisfaction of the patients with mechanical ventilator and communication board is found to be useful for enhancing communication pattern and level of satisfaction of the patients with mechanical ventilator. The findings conclude that the communication board developed by the researcher was found to be helpful in enhancing communication pattern and level of satisfaction of the patients with mechanical ventilator.