The index that assigns 1985 a base value of 100 fell from 69.5 to 69.2, the Conference Board said.
The monthly Consumer Confidence Index is based on a survey of 5,000 households.
"Consumer Confidence was virtually unchanged in April, following a modest decline in March. As was the case last month, the slight dip was prompted by a moderation in consumers' short-term outlook, while their assessment of current conditions continued to improve," said Lynn Franco, director of the Conference Board Consumer Research Center.
She said consumers were "cautiously optimistic."
In April, the number of respondents to the survey indicating economic conditions were "good" rose from 14.3 percent to 15.3 percent. The percentage of respondents indicating conditions were "bad" also rose, climbing from 33.2 percent to 33.5 percent.
On the employment front, the percentage of consumers indicating jobs were "plentiful" fell from 9 percent to 8.4 percent, while the percentage indicating jobs were harder to find fell from 40.7 percent to 37.5 percent.